CHAPTER XVIII.

FORMER GLACIAL EPOCHS; GEOLOGICAL EVIDENCE OF.

Cambrian Conglomerate of Islay and North-west of

Scotland.—Ice-action in Ayrshire and Wigtownshire

during Silurian Period.—Silurian Limestones in Arctic

Legions.—Professor Ramsay on Ice-action during Old

Red Sandstone Period.—Warm Climate in Arctic Regions

during Old Red Sandstone Period.—Professor Geikie and

Mr. James Geikie on a Glacial Conglomerate of Lower

Carboniferous Age.—Professor Haughton and Professor Dawson

on Evidence of Ice-action during Coal Period.—Mr. W. T.

Blanford on Glaciation in India during Carboniferous

Period.—Carboniferous Formations of Arctic Regions.—Professor

Ramsay on Permian Glaciers.—Permian Conglomerate in

Arran.—Professor Hull on Boulder Clay of Permian Age.—Permian

Boulder Clay of Natal.—Oolitic Boulder Conglomerate in

Sutherlandshire.—-Warm Climate in North Greenland during

Oolitic Period.—Mr. Godwin-Austen on Ice-action during

Cretaceous Period.—Glacial Conglomerates of Eocene Age in the

Alps.—M. Gastaldi on the Ice-transported Limestone Blocks of

the Superga.—Professor Heer on the Climate of North Greenland

during Miocene Period 292

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