Artesian reservoirs, 39
Augite, crystals of, in tuffs, 45, 182, 193
Augite-andesites, 51, 162, 199, 204, 209, 232, 235, 294, etc.;
classification of, 239, 245, 246, 266-284;
distribution of, 374;
aphanitic, 117-120, 125, 162, 168, 279;
relative frequency of, 235;
_see_ Basaltic andesites
Avuka, range, 179
Axes, stone, structure of, 383
Bare-poll, peak, near Soni-soni, 93
Barrack, Mr. A. H., 27, 123
Barrack, Mr. Alex., 364
Barratt, Mr., 68
Barrier-reef, great, of Fiji; _see_ under Submarine plateau
[169]Basaltic andesites, 47, 56, 64, 75, 108, 123, 137, 147, 148, 160,
164, 190, 204, 206, 208, 288;
classification of, 239, 266, 278;
distribution of, 374
Basaltic rocks, extensive disintegration of, 57, 64, 72, 129
Basaltic flows surrounding hills of acid andesite, 104, 115, 116, 374
Basaltic plains and plateaux, 6, 55, 62, 82, 107, 128-135, 373
Basaltic submarine flows, 338, 342, 344, 346, 347, 372, 375;
_see_ under Submarine plateau and Basaltic plains
Basalts, columnar, 3, 63, 78, 83, 84, 85, 123, 129, 133, 147, 170, 173,
203, 260, 284
Basalts, ophitic, 50, 74, 114, 133, 137, 138, 155, 159, 162, 191, 204,
213, 252, 256, 347;
the ophitic habit, 237, 238;
ophitic sub-orders, 236, 241-245;
ophitic genera, 256, 262, 272-276, 283
Basalts, olivine, relation of black and grey, 89, 90;
classification of, 239, 241-244, 252-265;
relative frequency of, 235;
distribution of, 374
Basalts, grey olivine, 65-67, 73-75, 77, 89, 253-255, 257, 261, 263
Basalts, highly basic, 258
Basalts, of Acicastello, 347;
of Mbua and Ndama plains, 58, 134, 262, 278;
of Ndreketi plains, 133, 134;
of Sarawanga plains, 129, 134, 262;
of Savu-savu peninsula, 190, 288;
of Seatura, 63-72, 85;
of Solevu Bay, 75-77;
of Wainunu, 85;
of Ulu-i-ndali, 89
Basalts associated with palagonite, 347
Basic glass, 312, 338;
_see_ Pitchstone, Crush-tuffs, Hyalomelan-tuffs
Bastite, 182, 297
Baur, Mr., 380
Blyth, Mr., 123
Brady, Mr. H. B., 322, 376
Breccias; _see_ Volcanic agglomerates
Bronzite, 182
Bromlow, Dr., 29
Büchner, Dr. Max, 22
Bulling, Mr., 32, 36, 232
Bunsen, on palagonite, 343, 344
Carbonate of iron, concretions of, 227, 351, 356
Carcharodon, 376
Chalcedony, 13, 138, 162, 183, 199, 226-22, 350-355;
_see_ Agate, Onyx, Flints
Chalmers, Mr., 233
Charts, old and new compared, 18, 19
Chert, 355
Classification of volcanic rocks, 235
Coleoptera of Fiji, 377
Columnar structure; _see_ Basalt, Acid andesite, Dacite,
Oligoclase-trachyte
Combe, Commander, 15
Cooper, Mr. H. S., 29
Coral reefs, upheaved, 7-12, 189, 200, 201, 318;
their absence in the higher levels, 7, 8, 12, 19, 375
Craters, traces of, 44, 52, 67, 80, 166, 186, 192, 195, 202
Crush-tuffs, 55, 94, 149, 157, 341;
general description, 334;
_see_ below
Crushing of basic glass;
in veins, 340, 341;
on surface of a submarine flow, 93, 338;
in matrix of pitchstone-agglomerate and in rubbly pitchstone, 94,
142, 145, 157, 313;
its connection with palagonite, 93, 339, 340-342, 346
Cumming, Miss Gordon, 22, 25, 29
Dacites, 3, 5, 100, 108, 235, 294, 304;
columnar, 101, 102;
definition of the term, 295;
classification and characters, 240, 302;
_see_ Acid andesites
Dall, Dr., 376
Dana, Prof., 3, 10, 11, 16, 21, 26, 72, 84, 129, 135, 218, 309, 363
Darwin, Mr., on barrier-reefs, 373
Datum-mark, 195
David, Prof., 376
Deep-sea deposits, 337
Delanasau, 68
Dillon’s Rock, 45
Diorite, 182, 193, 235, 249, 251
Doelter, on hornblende paramorphism, 308
Doleritic, use and definition of the term, 236, 238, 259, 274
Dolomite, 7
Drayton, peak; _see_ Mariko
Dykes, 51, 54, 63, 68-72, 78, 81, 142, 144, 148, 155, 156, 163, 164,
170, 171, 184, 199, 202, 209, 216, 220, 233, 234, 267, 268, 270,
277, 280, 282;
their two sets of felspar-lathes, 238
Eakle, Mr., 293, 294
Earthquakes, 37
Emergence of Vanua Levu, 1, 7-20, 321, 376-379;
age of, 376
Etna, mount, coast springs of, 39;
dykes in Valle del Bove, 237;
magnetic bomb, 364
Fairmaire, M., 377
Faro, island, Solomon Group, 2
Fawn, harbour, 9, 200, 318
Felsitic andesites, 106, 108, 295, 300;
_see_ Acid andesites and Dacites
Felsitic groundmass, as employed in classification, 236, 239, 240, 249
Felsitic orders, 249, 291, 297, 300, 302
Felspar-lathes in classification, 236, 241
Fern, tree, silicified caudex of, 360
Fish-scales, fossil, 154
Flints, 13, 81, 83, 138, 139, 222, 226, 350-360
Floating islands, 225
Floras of Fiji, Hawaii, and Tonga, 379
Flow-arrangement in classification, 236-238
Folgheraiter, Dr., 362, 365
Foraminiferal limestones, 130-132, 202, 318
Foraminiferous deposits (tuffs, muds, clays), 96, 109, 130, 134, 136,
139, 149, 154, 161, 170, 198, 205;
description of, 321-333;
altered, 324-326;
thickness of, 156;
_see_ Globigerina deposits and Palagonite-tuffs
Fossilised trees, 233
Freeland, Mount, 2, 6, 203-206, 269, 274
Gabbros, 180, 182, 184, 211, 235;
classification of, 239, 240;
characters, 249, 250;
_see_ Plutonic rocks
Geikie, Sir A., 375
Giant sedge; _see_ Scirpodendron
Globigerina deposits, 10, 55, 131, 158, 177, 187, 189, 190, 221,
321-326, 344;
_see_ Foraminiferous deposits
Globigerina limestone, 319
Gold, alluvial, in Vanua Levu, 116
Granular pyroxene, the sub-orders characterised by, 236, 241, &c.
Greenstones; _see_ Propylites
Groundmass, characters of, used in classification, 236-238
Haig, Major, on magnetic rocks, 363
Hale Peak, 210, 212
Hanusz, on floating islands, 226
Harker, Mr., 362, 367, 379
Harman’s Point, 191
Hawaii, 2, 38, 85, 363;
flora of, 379;
coast springs of, 38
Hedley, Mr., 376, 380
Hekla, Mount, 375
Holmes, Mr., 68
Hornblende, magmatic paramorphism of, 293, 299, 301, 303;
process described, 306
Hornblende-andesites, 91, 184, 193, 194, 201, 235, 294;
_see_ Acid andesites and hornblende-hypersthene andesites
Hornblende-gabbro, 184, 249, 250
Hornblende-hypersthene-andesites, 240, 298-302
Horne, Mr., 10, 21, 22, 25, 34, 55, 141, 143, 194, 195, 203, 225;
_see_ the preface
Hornstone, 350
Hot springs, general description of, 21-42;
list of, 40;
analysis, 28;
distribution in Vanua Levu, 36, 138, 233
Humboldt, A. von, on magnetic rocks, 361, 365
Hussak, on magmatic paramorphism, 308
Hutton, 380
Hyalomelan tuffs, 47, 80, 110, 333, 334
Hydrothermal metamorphism; _see_ Solfataric
Hypersthene; _see_ Pyroxene, rhombic
Hypersthene-andesites, 294, 296
Hypersthene-augite-andesites, 5, 52 147, 161, 164, 168, 171, 173-175,
178, 179, 182, 186, 190, 199, 201, 203, 208, 211, 230;
classification, 240, 247, 248;
characters of the orders and sub-orders, 285-292;
relative frequency, 235;
distribution, 374
Iceland, Vanua Levu compared to, 374, 375
Iddings, Mr., 306
Iron ore; _see_ Limonite
Iron sand, magnetic, 83, 106, 357
Ironstone gravel, 356
Islands, permanence of, 380, 381
Jackson, Dr. C. T., 28
Jasper, 13, 121, 139, 199, 350, 351, 355
Johnston-Lavis, Dr., 347, 375
Kalakala, Mount, 103, 305
Kalikoso District, 10, 15, 224-228, 350, 356, 358
Kandavu, 293, 306;
hot springs of, 22
Kavula, 65, 66
Kia Island, 2
Kioa Island, 2
Kiombo Coast, 92
Kleinschmidt, 22, 25, 293, 350
Koro, significance as a prefix; _see_ Place-Names
Koro-i-rea Hill, 75, 77
Korolevu Hill, 45;
natural section near, 48
Korolevu River, 62, 64
Koroma, Mount, 3, 51, 285
Koro-mbasanga Mountain, 166-169, 289;
name wrongly applied in Admiralty charts, 5, 172
Koro-navuta, 135
Koro-ni-valu; _see_ under Towns
Koro-ni-yalewa Mountain, 117
Koro-tambu Mountain, 167, 171
Korotasere, 208
Korotini Bluff, 156
Korotini Range or Tableland, 5, 153-165, 167, 325
Koro-utari, 163
Koro-wiri, 139
Kumbulau Peninsula, 90-95
Kuru-kuru District, 228
Lambasa coast, 218
Lambasa Plains, 138, 351
Lambasa River, 15, 138
Landslips, effects of, 111, 178, 327
Langa-langa River, 220, 225
Lango-lango River, 122
Lau Group, 7, 294, 378
Lava-flows, indications of sub-aerial, 52, 71, 119, 133, 152, 187, 190,
213, 232
Lea District, 199
Lekumbi Point, 12, 19, 60
Lekutu District, coast of, 11, 50, 273;
plains, 128, 351, 353, 356;
promontory, 16, 18;
river, 18, 62, 65
Limestones, recrystallisation of, 131;
coral, 318;
_see_ Foraminiferal limestones
Limonite, deposits of, 56, 132, 138, 226, 228, 351, 352, 356, 359
Lister, Mr., 378
Liversidge, Prof., 29
Liwa-liwa, 119
Loma-loma Ridge, 141
Lovo Valley, 169-173
Lovutu, 156
Macdonald, Dr., 21
Magma lakelets, 47, 71, 92, 273, 276, 277;
description of, 339-342, 346, 347
Magmatic paramorphism; _see_ Hornblende
Magnetic iron sand, 83, 106, 357
Magnetic peaks and rocks, 77, 108, 174, 186, 361-371
Mako-mako Hill, 103
Mali Island, 2, 218
Mali Point, 218
Malolo Island, 294
Mangrove belt, bare tracts in, 11, 14;
relation to reef-flat, 13;
rate of growth, 15, 19
Mangrove islands, growth of, 16, 17
Mariko, range and peak of, 5, 173, 185-189, 289, 368
Martin, Prof., of Leyden, 376
Masusu District, 84
Mauna Kea, 2
Mauna Loa, 2, 3, 363
Mauritius, magnetic rocks of, 363
Mbale-mbale District, 143, 313;
river, 150
Mbatini Mountain, 5, 166, 172-174, 367
Mbati-ni-kama, hot springs of, 33
Mbatiri, 134, 324
Mbenutha Cliffs, 109-111, 323
Mbona-lailai Mountain, 101
Mbua District, 3, 36, 37, 47;
bay, 18;
coast, 12
Mbua and Ndama Plains, 55-58, 356
Mbua-Lekutu Divide, 55, 297
Mbua shell-bed, 12, 58
Mbuthai-sau Valley, 218, 219
Mbutu-mbutu River, 79, 279
Middle Point, 137
Mountain ridges and their structure; _see_ under Ridge-mountains
Mountain-towns; _see_ Towns
Muanaira, 198
Mumu Peak, 108-110
Murray, Sir J., 337, 373
Naikovu Rock, 364
Nailotha Mountain, 6, 214-216, 310
Naindi Bay, 8, 189, 191, 195, 318
Naindi Gap, 189, 192
Naithekoro, 190
Naithombothombo, point, 54;
range, 229
Naivaka, 2, 3, 11, 18, 43-45, 261
Na-kalou, 133
Na Kama, Savu-savu, 25;
Lambasa, 32
Nakambuta District, 148-150
Nakarambo, 208
Na Kula, valley, 184;
range, 230
Nambuna District, 106
Nambuni Spur, 144
Nambuonu, hot springs, 32
Nandi Bay, 78
Nandi Gorge, 69, 78, 278
Nandongo, island, 16, 17;
town, 216;
hot springs, 33
Nandronandranu district, 117-121
Nandroro District, 66
Nandua District, 86, 320, 344
Nanduri District, 11, 14, 135, 136
Nangara-ravi Cave, 141
Nangara-vutu, 205
Nangorongoro Peak; _see_ Ngaingai
Na Raro Gap, 127
Na Raro Mountain, 2, 5, 123-127, 296, 301, 305
Narawai District, 66
Nareilangi, 124
Narengali District, 140, 147, 149
Narikosa Point, 220
Na Salia, 151
Na Savu, tableland, 79-81;
falls, 79, 279
Na Seyanga, 108
Na Sinu, 146
Na Suva Range, 64
Na Suva-suva Hill, 192, 369
Natasa Bay, 209
Natewa Bay, north-coast, 9, 208, 209, 291
Natewa Peninsula, 6, 9, 197-206
Nativi, 50
Natoarau, hot springs, 23;
river, 158
Na Tokalau, 91
Natoto Hill, 229
Natua District, 134, 149, 323
Natuvo or Natuvu, hot springs, 33, 209
Naumann on polaric lavas, 364
Navakaravi Hot Springs, 34
Navakavura, 96
Na Vatu Islet, 94
Navetau, 205
Naviavia Islet, 8
Navingiri, 46
Navuni, 202;
hot springs, 35
Navuningumu, 108-112, 303, 368
Nawavi, range, 135;
hot springs near, 31
Nawi or Na Wi, island, 26, 192;
hamlet, 211
Ndaku-ndaku, bay, 208;
hot springs, 34
Ndama, river and valley, 62, 67, 68, 71;
plains, 55-58
Ndavutu, district and river, 87;
for hot springs; _see_ Wainunu
Ndawathumi, 64, 80
Ndevo district, 205;
hot springs, 35
Ndoendamu Mountain, 209, 212
Ndrandramea, district, 2, 3, 83, 296;
map, 99;
description, 98-112
Ndrandramea Mount, 102, 296, 300, 304, 368
Ndranimako, 96, 322, 351
Ndrawa, district, 120, 281;
river, 118, 120
Ndreke-ni-wai, Natewa Bay, 200, 203;
hot springs, 34
Ndreke-ni-wai, Savu-savu Bay, 150, 152
Ndreketi, river, 15, 128, 132, 383;
plains, 132, 273, 351
Ndriti Basin, 67-72, 268, 270, 282
Ndrukau Mountain, 213
New Hebrides, 1
Ngaingai Mountain, 100, 296, 302, 304, 368
Ngala Mountain; _see_ Freeland
Ngalau-levu Range, 6, 199, 200, 370
Ngangaturuturu Cliffs, 119
Ngau Island, hot springs of, 22
Ngawa River, 138
Ngelemumu, 180, 219
Ngone Hill, 183
Nukumbolo, district, 151, 161, 162;
hot springs, 24
Nukunase or Nuku-ngase, 50, 270
Nukumbalavu, 190
Nuku-ndamu, 232
Numbu, 227
Numbu-ni-a-vula, 176
Oddone on magnetic rocks, 362
Oligoclase-trachytes, 6, 207, 219, 229;
description of, 308;
distribution, 374;
altered, 214-216;
columnar, 215, 220, 230, 231, 233
Olivine rocks, classification of, 239
Olivine-basalts; _see_ Basalts, olivine
Ono Island, hot springs, 22;
acid andesite, 293;
flints, 350
Onyx, 139, 227, 228, 353
Opal, 162, 163, 183, 351, 353
Ophitic basalts, their relation to palagonite, 347
Ophitic structure, as used in classification, 236, 237, 238
Ophitic sub-orders and genera, synopsis of, 241-248;
description of, 256, 272-276, 283
Orthophyric groundmass, as used in classification, 236, 237, 239, 240
Orthophyric orders and genera, 248, 290, 296, 297, 299
Ovalau, 294, 350
Palagonite, chapter on, 337-349;
_see_ also Palagonite-tuffs, Crush-tuffs, Crushing of basic glass,
Pitchstone &c.
Palagonite of Acicastello, 347
Palagonite tuffs, classification and characters, 317-336;
zeolitic, 334;
marls, 335, 344;
modes of occurrence, 5, 48, 53, 80, 81, 95, 96, 117, 118-122, 130,
131, 141, 143, 145, 148, 156-161, 169, 177, 193, 198, 202, 213
Palagonite, hydration and degradation of, 329, 348
Phenocrysts, their use in classification, 236
Pickering, Mr., 35
Pieper, Dr. O., 28
Pilsbry, Dr., 380
Pitchstone agglomerates and rubbly pitchstones, petrological
characters, 312, 313;
evidence of crushing and its connection with palagonite, 92-94, 142,
145, 157, 312, 313, 334, 340-342, 346 (_see_ Palagonite,
Crush-tuffs, Crushing of basic glass);
mode of occurrence, 105, 108, 142, 157, 169, 229, 230, 309
[170]Place-names, meaning of Fijian, 75, 79, 102, 119, 151, 172
Platania, Prof., 119, 347
Plutonic rocks, general description, 249-251;
relative frequency, 235;
distribution, 249, 374;
mode of occurrence, 180, 182, 184, 185, 193, 211
Polarity of magnetic rocks, 366-370
Porphyrites, 136, 175, 181, 197, 199, 204, 211, 261, 268, 274, 299;
belong to many orders, 236
Prismatic pyroxene of groundmass, its use in classification, 236,
241-248;
sub-orders and genera, 265, 270-272, 283, 287, 289, 298, 300, 302
Profiles of Vanua Levu, 3-6, 62, 83, 107, 113, 153, 167, 173
Propylites, 68-72, 106, 147, 162, 181, 191, 199, 204, 214, 215,
268-270, 282, 297;
origin of, 69, 72, 191
Pteropod-ooze deposits, description of, 320;
mode of occurrence, 84, 86, 109, 139, 201, 205, 344
Pumice-tuffs, acid, 6, 207, 218-223, 229-233;
general description, 336;
special descriptions, 218, 220, 231
Pumice-tuffs, basic, 119, 333;
_see_ Hyalomelan-tuffs
Pyroxene of groundmass, as a basis of classification, 236;
_see_ Granular pyroxene, Prismatic pyroxene, Ophitic structure, and
Synopsis
Pyroxene, rhombic, characters of, 285, 306;
intergrowths with monoclinic, 266, 306
Pyroxene, derivation from hornblende, 306
Quartz, crystals of, 106, 191, 354;
veins of, 106, 116
Quartz-andesites; _see_ Dacites
Quartz-porphyries, mode of occurrence, 215, 219, 220, 226, 227,
229-233;
relative frequency, 235;
general description, 309-311;
distribution, 6, 207, 374
Quartz-rock, 139, 351, 354
Rainfall, 30, 68, 120
Rambi, island, 2;
hot springs, 22
Ravi-koro mountain, 159
Ravi-ravi, 94
Ravuka, 120;
hot spring, 31
Renard, Prof., 293, 306, 338, 344
Rewa District in Vanua Levu, 95, 96
Rewa River, Viti Levu, changes at mouth, 16
Rhyolites, 209;
_see_ Quartz-porphyries
Rhyolite-glass, 220, 311
Rhyolitic-tuffs; _see_ Pumice-tuffs, acid
Ridge-mountains, their general appearance, 2, 6, 146, 153, 185, 210,
374;
their structure and mode of origin, 75, 145, 156, 165, 166, 171, 172,
177-180, 182, 188, 202, 210-212, 216, 234;
final conclusion, 375
Rivers; _see_ under Ndreketi, Lambasa Sarawanga, Wainikoro, &c.
Rivers, eroding power of, 62
Rocholl, Mr. H., 29
Rosenbusch, Prof., 306, 344
Ruku-ruku Bay, 53, 269
Salt Lake District, 2, 6, 9, 192-196
Sarawanga Plains, 15, 129-132, 351, 356
Sarawanga River, 15, 62, 129-131
Satulaki, 176, 268
Savarekareka Bay, 190, 326
Savulu, 118
Savu-riti Mountain, 210, 212
Savu-savu Hot Springs, 21, 25-30, 189
Savu-savu Peninsula, 189-192, 288
Sawa-ndrondro, 185
Scirpodendron costatum (Giant Sedge), 79, 83
Scoriaceous lava; _see_ Lava flows
Sealevu District, 146, 155, 156
Sealevu Divide, 136
Seatovo Range, 73-75
Seatura, mountain, 2, 3, 56, 253, 261, 374;
general description of, 61-72;
old town of, 67
Sections across Vanua Levu, 62, 107;
_see_ also Profiles
Seemann, Dr., 55
Sella, on magnetic rocks, 362
Semi-opal, 351, 353
Sesaleka Mountain, 3, 12, 53
Siliceous concretions, 81, 83, 96, 132, 135, 351-355
Siliceous rock, blocks of, 126, 355
Siliceous sinter, 24, 25, 32, 33, 37, 42
Silicification, conditions of, 358
Silicified corals, 10, 13, 81, 132, 135, 138, 139, 207, 221, 226-228;
theory of their origin, 228, 357;
general account of, 350-360
Silicified fern rhizome, 360
Silicified nullipores, 353, 354
Singa-singa, 110
Singatoka River, Viti Levu, 7
Skinner, Mr. S., 367
Skye, Isle of, magnetic rocks, 362
Smallwood, Mr., 196
Smythe, Colonel, 22, 195
Soapstones; _see_ Foraminiferous deposits
Sokena Ridge, 167, 169, 172
Solevu Bay, 75-78, 253
Solfataric action on rocks, 52, 69, 72, 191
Soloa-levu Mountain, 103-105, 115, 296, 305, 312, 374
Solomon Islands, 1, 2, 294, 359
Songombiau, 220
Soni-soni Island, 93, 94
Soro-levu Mountain, 172-174
Spence, Mr. F., 193
Spheroidal weathering in basalts, 57, 129
Stromboli, 214, 315
Submarine basaltic flows and eruptions; _see_ Basaltic submarine flows
Submarine plateau or platform of Fiji, 15, 18, 19, 56, 62, 72, 107,
372;
different explanations of, 373
Submarine tuffs, 326-336
Sueni District, 163
Suess, Prof., on thermal springs, 39;
on changes in the sea-level, 20, 377
Suva soapstone, 322, 376
Synopsis of classification of volcanic rocks, 239-249
Tachylyte or basic glass, 312, 337, 341, 343;
_see_ Basic glass, Pitchstone, Hyalomelan, &c.
Tahiti, 3, 72, 84, 363
Talasinga Districts, 55, 57, 64, 128, 132, 133, 224, 352, 383
Tambia, district, 137;
hot springs, 32
Tambu-lotu District, 104, 105
Tathelevu, 198
Tavia, mountain, 121;
ranges, 121-123
Tavua, 65
Tawaki District, 209, 229, 230
Tembe, 213, 214
Tembe-ni-ndio District, 130, 131, 319
Tenison-Woods, Rev., 376
Thambeyu, mountain, 5, 167, 289, 315, 326;
description of, 176-179
Thawaro Peak, 230
Thermal springs; _see_ Hot springs
Thiele, Mr., 21
Thoka-singa Mountain, 103, 249, 302, 305
Thombo-thombo; _see_ Naithombothombo
Thomson, Mr. J. P., 31, 135, 210, 225
Thongea, hot springs, 22;
basalt, 85
Thoroddsen, on Hekla, 375
Thuku, Mount, 6, 231, 308-310
Thulanga; _see_ Uthulanga
Thurston Range, 5, 167, 176;
_see_ Thambeyu
Tonga Group, 1, 378, 379
Tongalevu District, 62, 64, 279
Towns, old sites of mountain, 53, 67, 101, 102, 108, 156, 170
Trachytes; _see_ Oligoclase-trachytes
Tuffs, chapter on, 317-336;
foraminiferous, 326-333;
altered, 184, 187, 190, 332;
dacitic, 125, 126;
_see_ Pumice tuffs, acid and basic; Hyalomelan tuffs; Palagonite
tuffs; Crush tuffs;
mode of occurrence, 48, 90, 109, 119, 130, 156, 160, 177, 190, 205,
209, 215
Tunuloa District, 205
Tutu Island, 221
Ulu-i-matua, 75, 76
Ulu-i-mbau, 138, 139
Ulu-i-ndali, 3, 83, 87-90, 253, 370
Ulu-i-sori, 136
Underwood, Lieut., 364
Undu, district and promontory, 6, 10, 36, 228-234, 311, 360
Upheaval; _see_ Emergence
Urata, 184, 298
Uthulanga Ridge, 211, 286 (also named Thulanga)
Vakalalatha Lake, 15, 225
Valanga Range, 181-185
Valavala Bay, 203
Valeni, 122
Va Lili, 5, 140-146
Valleys, origin of, 2, 146, 151, 219
Vandrani, district, 139, 159;
hot springs, 32
Vanua Mbalavu, hot springs, 22
Variolite, 150, 283, 313
Vatui, 54, 369
Vatu Kaisia, 5, 113-116, 296, 301, 305, 374, 375
Vatu-karoa, 209, 282
Vatu-karokaro, 54
Vatu-kawa, river, 151;
district, 160
Vatu-kerimasi, 101
Vatu-lele Bay, 184
Vatu-levoni, 139
Vatuloaloa Hot Springs, 31
Vatu Mata, 103
Vatu-ndamu, 91
Vatu-tangiri, 136, 144
Vatu Vanaya, 101
Vatu Vono Point, 88, 89
Vatu-vono District, 121, 122
Viene District, 198
Visongo District, 221
Viti Levu, 7, 18, 350, 364, 372
Vitina, 223
Volcanic agglomerates, general description of, 314-316;
their thickness, 110, 156, 171, 178, 315;
mode of occurrence, 5, 79, 91, 110, 112, 117, 141, 143, 144, 149,
155, 156, 161, 169-172, 176-179, 188, 193, 213, 214;
lying above submarine deposits usually palagonitic and often
foraminiferous, 110, 141, 143, 149, 168, 169-171, 176-179, 188,
213, 214;
_see_ Pitchstone-agglomerates and Landslips
Volcanic bomb-formation, 46-48
Volcanic mud deposits; _see_ Foraminiferous deposits
Volcanic necks, 54, 58, 90, 93, 95, 112, 183, 192, 230, 234, 253, 277,
283, 286, 375
Volcanic rocks, classification of, 235;
distribution of, 374
Vuinandi Bay, 208
Vuinandi Gap, 175
Vuinasanga, district, 145;
hot springs, 31
Vui-na-savu, river and district, 222, 223, 225
Vula Votu Peak, 176
Vungalei Mountain, 212, 213, 315
Vuni-ika Bay, 218
Vunikondi, 232, 233, 282
Vunimbele, 139;
hot springs, 33
Vunimbua, district and river, 182, 183
Vunimoli, hot springs and district, 33, 138, 139
Vunisawana, district, 194;
hot springs, 34
Vuni-tangaloa, 194
Vunivuvundi District, 87
Waikatakata, Natewa Bay, hot spring and district, 34, 203, 275
Waikawa Mountains, 201, 319
Wailea, bay and district, 46, 50
Wailevu River, 15, 138
Wai Mbasanga, Viti Levu, hot springs, 21
Waimotu District, 208
Wai Ndina, Viti Levu, hot springs, 21
Wainikoro, district, 217, 224-228, 356;
coast, 219, 308, 310;
river, 225
Wai-ni-ngio River, 151, 160
Wainunu, hot springs, 22;
rainfall 68;
river and valley, 62, 82, 83
Wainunu, plateau or tableland, 3, 82-87, 373;
_see_ figures on pages 83, 107
Waisali District, 146, 151
Waisali Saddle, 146-148
Waiwai, 143-145
Waterfalls, 79, 141, 163
Wawa Levu Mountain, 101, 302, 304
Weed, Mr., on the origin of siliceous sinter, 38
Wichmann, Dr. A., on a continental condition of the Fiji Islands, 376;
on hyalomelan tuff, 334;
on flints and silicified corals, 350, 352, 360;
on Kandavu andesites, 293;
on the absence of quartz-andesites in the South Seas, 294, 309;
_see_ the preface
Wilkes, Commodore, 11, 15, 19, 25, 363, etc.
Wittstock, Mr., 36, 47, 53
Yanawai coast, 95-97, 122
Yanawai, river and valley, 113-116, 121
Yanganga Islands, 2
Yanutha Point, 123, 284
Yaroi, 189, 325
Yasawa Group, 294
Zeolites, formation of, in palagonite, 338
Zeolitic palagonite-tuffs, 334
Zirkel, on intergrowths of rhombic pyroxene, 306;
on palagonite, 343;
on magnetic rocks, 361
THE END
R. CLAY AND SONS, LTD., BREAD ST. HILL E.C., AND BUNGAY, SUFFOLK.
---------------------
Footnote 1:
In the case of the island of Faro in the Solomon Group, I have
described a similar process of island-building. (_Geology of the
Solomon Islands_, p. 37.)
Footnote 2:
In 1897 I spent several months in travelling over this island and
ascended, sometimes more than once, the three great volcanic
mountains. Perhaps at some future time I may renew my examination of
this interesting region.
Footnote 3:
Strictly speaking Korolevu indicated in the profile would not be
visible.
Footnote 4:
Mariko is the native name of the Drayton Peak of the chart. Mbatini is
the correct name for the Koro Mbasanga of the chart, the true Koro
Mbasanga lying three miles to the north. Thambeyu is a native name for
the Mount Thurston Range.
Footnote 5:
There has been some confusion in the native names of the peaks in this
part of the island, which I have not been able to remove.
Footnote 6:
_A Year in Fiji_, 1881, pp. 22, 167.
Footnote 7:
_Geology of the United States Exploring Expedition_, 1849.
Footnote 8:
This height has been supplied from memory, as I omitted to refer to
the exact level of the erosion line in my notes.
Footnote 9:
They were described to me as dry for a fortnight at a time. I was
prevented from making more than an occasional visit to them.
Footnote 10:
_Atlas of the United States Exploring Expedition_, vol. i.,
Philadelphia, 1850.
Footnote 11:
This, however, is not the case with the recent changes at the mouth of
the Rewa River in Viti Levu, where the bare sandy point of Lauthala
has extended itself seaward between 500 and 600 yards since 1840,
whilst Port Nukulau has shoaled a fathom in the same period. But I can
find no evidence of any marked advance in the mangrove margins either
towards Nukulau or on the Kamba side, the only change recognisable
being in the bare _sandy_ point of Lauthala, the rapid extension of
which has been such as to attract the attention of residents, both
whites and natives. Dana, who was in this locality in 1840, remarks in
the _Geology of the U.S. Exploring Expedition_, that he had learned
from a person who had resided there for forty years that during this
period the deposits had lengthened the river half a mile. When I was
on the Rewa in 1897 I heard that the natives in old time could see
Suva Point from Rewa. This is probably a native legend connected with
the modern extension of Lauthala Point. (The charts compared in making
the above measurement of the recent advance of this point were the
plan of the Rewa Roads by Wilkes, in 1840, and the Admiralty charts
1757 and 905, the former of which was based on Lieut. Dawson’s survey
in 1875, the last being corrected to 1897.)
Footnote 12:
Between Mathuata Island and the coast a change is indicated from 9-10
fathoms to 8-9 fathoms, north of Motua Island 12-13 to 11-12, and
between Nangano and Thakavi 16 to 14 fathoms.
Footnote 13:
By referring to the chart it will be seen that extensive mud-flats
occur at the mouths of the Sarawanga and Ndreketi rivers, where the
land-margin is slowly advancing.
Footnote 14:
_United States Exploring Expedition_, vol. x.; _Geology_, by J. D.
Dana, p. 343.
Footnote 15:
_A Year in Fiji_, by John Horne, London, 1881, p. 163.
Footnote 16:
Journal, _Royal Geographical Society_, 1857, vol. 27.
Footnote 17:
_Scottish Geographical Magazine_, August, 1891.
Footnote 18:
_Journal des Museum Godeffroy_, heft 14, Hamburg, 1879.
Footnote 19:
Dr. Max Büchner also refers to this spring in his _Reise durch den
Stillen Ozean_, 1878.
Footnote 20:
_Bulletin Museum Comparative Zoology_, Harvard, vol. 38; Geolog.
Series V., No 1, Nov. 1900.
Footnote 21:
Amongst the other descriptions of these springs I may refer to that of
Kleinschmidt in the work quoted on p. 22, to that of Miss Gordon
Cumming in _At Home in Fiji_, to that of Horne in his _Year in Fiji_,
&c. They are sketched in the descriptions of Kleinschmidt, Miss
Cumming, and Commodore Wilkes. The analyses are given on a later page
together with the references.
Footnote 22:
_Pacific Islands, Sailing Directions_, vol. ii., Central Groups, 1900,
p. 185.
Footnote 23:
From what I remember the usual exposure at low-water in 1898 was less
than a foot. I have little doubt as to the identity of the locality.
This rock is one of the “sights” of the place at the present time. It
would be interesting for a resident to compare carefully its present
condition with that as described by Wilkes. Dana in the work quoted on
p. 10, refers to this rock as a knoll of basalt; but he never visited
the locality and only obtained his account from the officers of
Wilkes.
Footnote 24:
_Narrative of the United States Exploring Expedition_, III., 199, by
Commodore Wilkes. See also Dana’s _Geology_ of the same expedition.
Footnote 25:
_Journal des Museum Godeffroy_, heft 14, Hamburg, 1879.
Footnote 26:
_Islands of the Pacific_, by H. Stonehewer Cooper, 1888 edition.
Footnote 27:
_Journal Royal Society_, New South Wales, 1880, vol. 14. Miss Gordon
Cumming in _At Home in Fiji_ gives the same analysis but differently
stated.
Footnote 28:
To avoid error, I have given the results of each without converting
them to a common standard. The numbers in brackets are taken from the
form of Prof. Liversidge’s analysis given in Miss Gordon Cumming’s
book.
Footnote 29:
_United States Exploring Expedition_, vol. 10, Geology.
Footnote 30:
_Proceedings_, Queensland Branch, Geographical Society, Australia,
vol. 1. 1886.
Footnote 31:
I took the temperature at monthly intervals between October, 1896, and
September, 1897. The mean annual temperature of the air in the shade
would be about 64° at an elevation of between 3,000 and 4,000 feet.
Footnote 32:
At Ewa there are pumping plants capable of supplying 75 million
gallons a day, the water being drawn entirely from artesian wells.
(_Report on Hawaii_, by Dr. Stubbs, bulletin 95, 1901; U.S. Department
of Agriculture.)
Footnote 33:
This hill is figured in Wilkes’ narrative under the name of Dillon’s
Rock (vol. 3, p. 235). This, however, is not the Dillon’s Rock of his
chart, where the name is given to a rock on the west side of the
entrance to Wailea Bay.
Footnote 34:
See remarks on “crush-tuffs” on p. 334.
Footnote 35:
Species not identified.
Footnote 36:
In one of my traverses I crossed a level district extending a mile
N.E. of Ndriti without changing my elevation.
Footnote 37:
At Delanasau, on the north or dry coast of the island, the average
rainfall, according to many years’ observations by Mr. Holmes, is
about 115 inches. At Wainunu, near the wet or south coast, the
observations of Mr. Barratt and others extending over 16 years give an
average of 160 inches. In the mountains this would be nearly doubled.
Footnote 38:
This question, which has so often been raised with respect to the
propylites, will probably receive a different answer from different
localities. The matter is further discussed on later pages.
Footnote 39:
The dyke-rock has a specific gravity of 2·7; but is slightly
vesicular. It shows a few small plagioclase phenocrysts in a
groundmass of felspar-lathes, augite grains and prisms, magnetite, and
a little brown interstitial glass. The felspar-lathes average ·14 mm.
in length and are for the most part not parallel. Secondary calcite
occurs in the groundmass, and the powdered rock effervesces a little
in an acid.
The rock forming the offshoot of the dyke differs only from the parent
rock in its more vitreous character. Although the felspars and augites
of the groundmass are fairly developed, the residual glass is much
more copious, and in places where it has segregated, forming
“lakelets,” it has been subjected to an alteration often observed in
palagonite when there are concentric alternating zones of a
tan-coloured fairly refractive material and calcite.
The reddish scoriaceous lava in contact with the dyke shows no
phenocrysts. The groundmass displays more or less parallel
felspar-lathes, ·1 mm. long, augite grains, and much magnetite. The
residual glass is fair in quantity; but is mostly gathered into
“lakelets” of brown altered glass with sometimes calcite in the
centre.
The vitreous border of the dyke is composed of a dark glass quite
opaque in the outer portion, but clearer and showing incipient
crystallisation in the inner portion.
Footnote 40:
_Characteristics of Volcanoes_, 1890.
Footnote 41:
Referred to genus 16 of the olivine-basalts.
Footnote 42:
This subject is discussed in Chapter XXVI.
Footnote 43:
“Na Savu” is the Fijian for waterfall. The complete name of this fall
is “Na Savu ni nuku.”
Footnote 44:
The flinty concretions are described on page 354, and the iron sand on
p. 356.
Footnote 45:
_Geology of the United States Exploring Expedition._
Footnote 46:
A similar arrangement was observed in the columnar basalt of Kauai in
the Hawaiian Islands. It is presumed that these Hawaiian flows are
sub-aërial.
Footnote 47:
The unaltered glass, which incloses a few plagioclase phenocrysts, has
a specific gravity of 2·7, and is readily fusible.
Footnote 48:
They are described on p. 322.
Footnote 49:
This absence of a healthy forest-growth, such as occurs on the level
summit of the neighbouring Soloa Levu and in all like situations, has
probably some geological significance.
Footnote 50:
These tuffs are probably submarine. They will be found described with
tuffs of the same character on p. 333.
Footnote 51:
The track attains an elevation of about 1,300 feet, but the top of the
watershed is two or three hundred feet lower.
Footnote 52:
It belongs to the 3rd order of the hornblende-hypersthene-andesites
described on p. 299.
Footnote 53:
Occasional views of its summit only are obtained from the eastward, as
from the Ndrandramea mountains and their vicinity.
Footnote 54:
Alluvial gold has long been known to occur in the bed of the Yanawai
below Vatu Kaisia; but it has never been found in paying quantity.
Footnote 55:
Under the microscope it is shown to be granular in structure,
exhibiting a mosaic of irregular quartz grains.
Footnote 56:
The blocks of the agglomerate in this last locality are from one to
three feet across.
Footnote 57:
It displays in the groundmass augite prisms in flow-arrangement, and
is referred to genus 20 of the augite-andesites.
Footnote 58:
Referred to genera 16 and 20 of the augite-andesites.
Footnote 59:
These foraminiferal limestones are described on p. 319.
Footnote 60:
_Proceedings_, Queensland Branch, Geographical Society of Australasia,
Brisbane, 1886, vol. i.
Footnote 61:
_Geology of the United States Exploring Expedition._
Footnote 62:
_Pacific Islands_, vol. ii. 1900.
Footnote 63:
It is referred to the 5th sub-order (genus 18) of the
hypersthene-augite-andesites characterised by prismatic pyroxene and
more or less parallel felspar lathes in the groundmass, as described
on p. 289. It displays abundant opaque porphyritic plagioclase giving
extinctions of oligoclase-andesine. The pyroxene phenocrysts have dark
alteration-borders. There is a little altered interstitial glass.
Spec. grav. 2·55.
Footnote 64:
I did not ascend to the top of Ulu-i-mbau. It is, however, evidently
composed of basic andesitic rocks, occasionally amygdaloidal. On its
slopes up to at least 600 feet above the sea occur agglomerate-tuffs
and finer submarine tuffs, as above described, overlying
foraminiferous clays, a submergence of quite 500 feet being indicated
by the investing deposits.
Footnote 65:
I did not find any foraminiferal shells or other organic remains
either in this tuff or in the similar tuffs occurring on the adjacent
slope of Va-lili up to 1,100 feet. My specimens, however, are very
small.
Footnote 66:
It rises in the background of the view.
Footnote 67:
They are described under sample E on p. 332.
Footnote 68:
Referred to genus 37 of the olivine-basalts.
Footnote 69:
On the right side of the river close to Vatu-kawa there are some
cliffs displaying a section of the mountainous spur, referred to on p.
151, that separates the valleys of the Mbale-mbale and Vatu-kawa
rivers, an exposure quite apart from the rocks exhibited on the
adjacent southern slopes of the main range. These cliffs are formed of
bedded grey tuffs marked by single layers of blocks 6 to 8 inches
across and dipping about 30° S.S.W. The tuffs in their texture are not
unlike sub-aerial tuff-deposits. They contain no lime and are composed
of basic materials with a little palagonite. They seem to indicate
some subsidiary vent, close to the present village of Vatu-kawa, which
may have been active shortly before or during the emergence of this
district.
Footnote 70:
These altered tuffs on the southern slope of this range are described
on p. 332.
Footnote 71:
Referred to genus 16, species A, sub-species 1, of the
augite-andesites.
Footnote 72:
Referred to genus 9, sub-genus A, of the augite-andesites.
Footnote 73:
Referred to genus 9, sub-genus B, of the augite-andesites.
Footnote 74:
Both these rocks belong to the hypersthene-augite andesites, showing
phenocrysts of both monoclinic and rhombic pyroxene. The first belongs
to the orthophyric order described on p. 290; whilst the second
belongs to the second order (genus 13, p. 287) where the felspars of
the groundmass are lathe-like and in flow arrangement.
Footnote 75:
The highest dyke trends N. 48° E. and is inclined from the vertical
about 15° N.W. The dyke, 5 or 6 yards below it, trends N. 30°E. and is
vertical. The dyke, 50 yards farther down, trends N. 35° E. and is
inclined from the vertical about 5° N.W. The inclination was only
estimated. The bearings are true.
Footnote 76:
Both the types are referred to genus 1 of the augite-andesites, the
olivine, when present, being quite insufficient to give a character to
the rock. They however belong to different species according to the
length of the felspar-lathes, which in the doleritic rocks averages
·2 mm. and in the other type ·08 mm.
Footnote 77:
It is pointed out on p. 5 that this name is wrongly applied in the
Admiralty charts to Mount Mbatini, a mountain about three miles south
of it.
Footnote 78:
Referred to genus 13 of the augite-andesites.
Footnote 79:
They are blackish and somewhat compact (sp. gr. 2·67-2·71) and have
very small felspar-lathes less than ·1 mm. long. They contain both
rhombic and monoclinic pyroxene, and are referred to genera 1 and 13
of the hypersthene-augite-andesites.
Footnote 80:
I discovered this error in a rather practical fashion by ascending the
wrong mountain. The natives were engaged to take me to Koro-mbasanga
and they performed their task, my aneroid and compass soon indicating
that I was not on the highest peak of the island, but on a lesser peak
three miles north of it.
Footnote 81:
Vula Votu is the name of a peak lying to the east. Ngoinangai is a
forked mountain still further east.
Footnote 82:
A kind of “edible” bird’s-nest is found in this cave.
Footnote 83:
This rock is described on p. 251.
Footnote 84:
It is described under Sample C on p. 325.
Footnote 85:
It is granular, but fuses in the blowpipe flame into a clear glass and
gelatinises in HCl. Probably a form of natrolite.
Footnote 86:
It is described under Sample D on p. 326.
Footnote 87:
_Ten Months in Fiji_, London, 1864.
Footnote 88:
_A Year in Fiji_, pp. 154, 169; London, 1881.
Footnote 89:
It displays an abundance of small phenocrysts of plagioclase, augite,
and olivine partly serpentinised, in a groundmass composed in the main
of coarse augite grains (·025 mm. in size) and of felspar microliths
(·07 mm. in length) in smaller proportion, with little if any residual
glass. Specific gravity 2·98. It is near the Waikawa basalt, referred
to on p. 202, and is placed in the same genus (13) of the olivine
class.
Footnote 90:
They are described on p. 269 under the non-porphyritic sub-genus of
genus 2 of the augite-andesites.
Footnote 91:
These rocks are in most cases referred to the orthophyric and felsitic
orders of the hypersthene-augite andesites. The rocks of the
last-named order prevail, and form the type of the group, as described
on p. 291.
Footnote 92:
It belongs to genus 37 of the olivine class. The felspar-lathes
average 0·2 mm. in length, and there is a little altered interstitial
glass.
Footnote 93:
It is referred to genus 16, species D, of the augite-andesites. The
felspar-lathes have an average length of ·3 mm.
Footnote 94:
_Proceedings_, Queensland Branch, Geographical Society of Australia,
vol. i.; 1886.
Footnote 95:
Referred to genus 9 of the augite-andesites.
Footnote 96:
The general characters of these rocks are described on p. 308.
Footnote 97:
_Geology of the United States Exploring Expedition._
Footnote 98:
_A Year in Fiji_, p. 22.
Footnote 99:
Described on p. 310.
Footnote 100:
These rocks are described on p. 308.
Footnote 101:
It contains small phenocrysts of plagioclase (medium andesine), and of
augite and rhombic pyroxene, and is referred to genus 1 of the
hypersthene-augite andesites.
Footnote 102:
See paper quoted on p. 31. It is noteworthy that Mr. Horne refers only
to a single floating island.
Footnote 103:
_Journal_, Royal Geographical Society, June, 1894.
Footnote 104:
Described on p. 309.
Footnote 105:
Described on p. 310.
Footnote 106:
Referred to genus 13 of the augite-andesites. The felspar-lathes
average ·1 mm. in length, and there is a little interstitial glass.
Footnote 107:
Referred to genus 16 of the augite-andesites. There are two sets of
felspar-lathes in the groundmass; the larger, ·23 mm. long, are more
or less parallel; the smaller, ·04 mm. long, form a plexus.
Footnote 108:
Each division would theoretically also possess an orthophyric and a
felsitic order; but these orders are not represented in my collection
and need only be mentioned.
Footnote 109:
Not represented in the collection.
Footnote 110:
I apply the term “diorite” to granitoid rocks formed entirely of
plagioclase and hornblende.
Footnote 111:
According to the size of the plagioclase phenocrysts, whether
averaging less than or more than 3 mm. in size, these rocks may be
divided into a non-porphyritic and a porphyritic sub-genus.
Footnote 112:
_Petrographie des Viti Archipels_; Miner. und Petrogr. Mittheil; band
v, heft 1, Wien, 1882.
Footnote 113:
_Physics and Chemistry_, II. Report Scient. Results; H.M.S.
Challenger; London, 1889.
Footnote 114:
_Petrographical Notes on the Fiji Islands_; Proceed. Amer. Acad. Arts
and Sciences; vol. 34; no. 21; May, 1899.
Footnote 115:
_Notes on the Limestones and General Geology of the Fiji Islands_,
Bull. Mus. Comp. Zool, vol. 5. Geolog. Ser. vol. 5, no. 1, Cambridge,
Mass., U.S.A. Nov. 1900.
Footnote 116:
Wichmann describes rocks from the cliffs of the Singatoka river and
from Ovalau.
Footnote 117:
_Geology of the Solomon Islands_, by H. B. Guppy, 1887, pp. 6, 36.
Footnote 118:
The term “felsitic andesite” is suitable for this microfelsitic type.
Footnote 119:
I have borrowed this term from Rosenbusch’s _Microscopical
Physiography of the Rock-making Minerals_, translated by Iddings.
Footnote 120:
_Challenger Reports_, Physics and Chemistry II.
Footnote 121:
_Neues Jahrb. fur Mineralogie_, 1884.
Footnote 122:
For their mode of occurrence, see pp. 215, 220, 230-233.
Footnote 123:
Highly altered rocks of this class are exposed at the base of Mount
Nailotha as described on p. 215.
Footnote 124:
See work quoted on p. 218.
Footnote 125:
See p. 230.
Footnote 126:
_Quart. Journ. Geolog. Soc._ xliv. 1888.
Footnote 127:
Zirkel’s _Petrographie_, iii., 694.
Footnote 128:
This basalt is not fusible in the ordinary blow-pipe flame.
Footnote 129:
In this connection see the description of the Soloa-levu pitchstone on
p. 312.
Footnote 130:
See the note at the end of this chapter.
Footnote 131:
Quoted in Zirkel’s _Petrographie_, iii., 689.
Footnote 132:
I have visited this locality on several occasions with the special
object of studying the relation of the basalt to the associated
palagonite-tuffs and clays. A general discussion of this question
would be out of place here; but I may remark that the conclusion
arrived at by me is that these deposits are not sedimentary but are
entirely the result of the disintegration of palagonite _in situ_.
This is quite opposed to the view of their sedimentary origin held by
Dr. Johnston-Lavis, Prof. Platania, and other Italian geologists....
The basalt is scoriaceous, semi-vitreous, and semi-ophitic, and
closely approaches the type of basalt above defined.
Footnote 133:
_Reisen auf den Viti-Inseln_, as quoted on p. 22.
Footnote 134:
_Petrographie des Viti-Archipels_, quoted on p. 293.
Footnote 135:
See work quoted on p. 378.
Footnote 136:
_Solomon Islands and their Natives_, by H. B. Guppy, p. 78.
Footnote 137:
The region is described on pp. 224-228.
Footnote 138:
For the meaning of “talasinga” see p. 55.
Footnote 139:
The portion exhibiting the coral structure has a specific gravity of
2·54.
Footnote 140:
A good list of references to the early German authorities on the
subject is given in the _American Journal of Science and Arts_ for
1831, vol. 20.... Zirkel in his _Lehrbuch der Petrographie_ (1893,
vol. i. p. 565) gives most of these and many more recent.... Harker in
his paper below named refers to a review of the earlier literature in
_Verh. naturh. Vereins_. Bonn, 1851, vol. 8, and to a more complete
bibliography by Meli in _Boll. Soc. Geol. Ital._ 1881, vol. 9....
British Association Report in 1889 by Professors Rücker and Thorpe on
the Magnetic State of the British Isles.... _Nature_ for August and
September, 1894, &c.... Harker on magnetic disturbances in the Isle of
Skye, _Proc. Cambr. Philos. Soc._ vol. 10, part 5.... Skinner in
_Proc. Cambr. Philos. Soc._ May, 1894.... Clark in _Journ. Roy.
Instit._ Cornwall, 1890-93.... Folgheraiter in _Frammenti concernanti
la geofisica_, Rome: referred to in _Nature_, July 27, 1899, and Nov.
8, 1900.
Footnote 141:
Nearly all volcanic rocks at all basic are magnetic, owing to the
constant presence of magnetite; but magnetic polarity, when the
rock-fragment has a negative and a positive pole, is not directly
concerned in volcanic rocks with the mineral composition.
Footnote 142:
Some of the earliest observations were made on granites and trachytes.
Footnote 143:
_Geology of the United States Exploring Expedition_, 1849, p. 294.
Footnote 144:
_Quarterly journal Geological Society_, vol. li., p. 469.
Footnote 145:
Wilkes’ _Narrative of the U.S. Exploring Expedition_, iii., 185.
Footnote 146:
Of the tuffs and clays, almost all submarine and often containing
tests of foraminifera and sometimes molluscan shells, about 90 per
cent. exhibit simple magnetism in a slight degree, but out of nearly
100 specimens tested none show polarity.
Footnote 147:
On p. 357 will be found some notes on the magnetic iron sand that
occurs in great abundance in river and stream beds.
Footnote 148:
These values represent the number of degrees that the magnetic needle
is repelled. The method is described above. A note on the average
amount of polarity found in all my polaric rocks is given at the end
of the chapter. The term “dacite” _is here an equivalent_ of “felsitic
andesite.”
Footnote 149:
This name has been wrongly applied in the Admiralty chart to the
mountain of Mbatini. Koro-mbasanga, 2,500 feet, lies three miles to
the north.
Footnote 150:
This rock is described on p. 109. There is no exceptional development
of magnetite for a basic rock in the groundmass.
Footnote 151:
Unfortunately, I have no data for the peaks of Na Raro and Vatu
Kaisia, except that specimens obtained below the summits are
non-polaric. In the case of Na Raro I did not retain the specimen
obtained at the top; whilst in my ascent of Vatu Kaisia I did not
quite reach the summit.
Footnote 152:
The mode of measurement is described on p. 366.
Footnote 153:
See pp. 2, 15, 18, 56, 62, 72, &c.
Footnote 154:
_The Islands and Coral Reefs of Fiji_, Bull. Mus. Comp. Zool. Harv.
Coll. vol. 33, 1899.
Footnote 155:
_Scott. Geogr. Mag._ 1895.
Footnote 156:
_Ancient Volcanoes of Great Britain_, by Sir A. Geikie, 1897, ii. 260.
Footnote 157:
See Wichmann in _Min. und Petrog. Mitth._ band v. heft 1.
Footnote 158:
_Amer. Journ. Sci._ VI. 165, 1898. See also Agassiz on the _Islands
and Coral Reefs of Fiji_, before quoted.
Footnote 159:
_Proc. Linn. Soc._ N.S.W. 1879-80, p. 358.
Footnote 160:
_Quart. Journ. Geolog. Soc._ vol. 44, 1888.
Footnote 161:
See Preface to the report of Mr. Andrews quoted on a later page.
Footnote 162:
_Das Antlitz der Erde_, French edition by E. de Margerie, ii. 534.
Footnote 163:
See the paper before quoted on the coral reefs of Fiji.
Footnote 164:
_Bull. Mus. Comp. Zool._ Harv. Coll. vol. 38. _Geolog. Ser._ vol. 5,
no. 1, 1900. _On the Limestones and General Geology of the Fiji
Islands_, by E. C. Andrews.
Footnote 165:
_Quart. Journ. Geolog. Soc._ vol. 47, p. 590, 1891. See also Mr.
Harker’s paper below quoted.
Footnote 166:
_Geolog. Mag._ June, 1891.
Footnote 167:
Seemann’s _Flora Vitiensis_, Horne’s _Year in Fiji_, Hillebrand’s
_Flora of the Hawaiian Islands_, Hemsley’s “Flora of the Tonga
Islands” in _Journal Linnean Society_, Botany, vol. 30.
Footnote 168:
See Hutton _Proc. Linn. Soc._ N.S.W. 1896, Baur, _Amer. Nat._ 1897,
Pilsbry, _Proc. Nat. Sci. Philad._ 1900, Hedley, _Proc. Linn. Soc._
N.S.W. 1892, 1899, &c.
Footnote 169:
The term “basalt” is here used in a general sense to include
olivine-basalts, basaltic andesites, and other basic types of the
augite-andesites and hypersthene-augite andesites.
Footnote 170:
The usual signification of “koro” as a prefix or part of names of
hills and mountains is a “prominence” or “projection.” It is a mistake
on my part to assume that in such cases it is as a rule equivalent to
a town or village.
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Transcriber's Note
There is some inconsistent spelling and hyphenation in this book which
has not been normalized.
Some corrections have been made to the text. In particular, punctuation
was corrected. Additionally, the following changes have been made:
p. 10 beween -> between
p. 75 ·15 m. long -> ·15 mm. long
p. 114 ts -> its
p. 208 aud -> and
p. 244 Pyroxyene -> Pyroxene
p. 270 adoped -> adopted
p. 345 tea-estat -> tea-estate