+--------------+--------------------------+--------------------------+
|=Life Ages of |=Pictorial Diagram Showing|=Rocks and Strata to |
|the Earth= |the Corresponding Forms of|which they belong= |
| |Animal and Plant Life, and| |
| |Rock Strata in the Earth’s| |
| |Crust.= | |
+--------------+--------------------------+------------------+-------+
|=Cenozoic=, | |Alluvium, Gravel, |=Ceno- |
|or Recent | |Mud, Sand, Clay, |zoic= |
|Life. Age | |Marl, Limestone. | |
|of Mammals. | | | |
+--------------+ +------------------+-------+
|=Mesozoic=, | |Chalk, Gault, |=Meso- |
|or Middle | |Green Sand, Oo- |zoic= |
|Life. Age | |lite, Clays and | |
|of Reptiles. | |Limestone, China | |
| | |Clay, Shales, | |
| | |Cement, Sandstone,| |
| | |Pervian. | |
+--------------+ +------------------+-------+
|=Paleozoic=, | [Illustration] |Coal Massives, |=Paleo-|
|or Old Life. | |Upper and Lower. |zoic= |
|Age of In- | |Millstone, Grit, | |
|vertebrates. | |Mountain, Lime- | |
|Age of Fishes.| |stone, Old Red | |
|Age of | |Sand Stone, Iron | |
|Acrogens. | |Ore, Gypsum, Gas, | |
| | |Lead, Zinc, Phos- | |
| | |phate, Marble, | |
| | |Sandstone, Shales,| |
| | |Copper. | |
+--------------+ +------------------+-------+
|=Proterozoic=,| |Copper, Silver, |=Pro- |
|or Earlier | |Lake Superior Iron|tero- |
|Life. Earliest| |Ores, and many |zoic= |
|Forms of Life.| |Metals. Granite, | |
| | |Schists. Emery, | |
| | |Gems, and Building| |
| | |Stone. | |
+--------------+--------------------------+------------------+-------+
1. Sivatherium, (_siv-a-thē´-ri-um_). 2. Mastodon, (_mas´tō-don_).
3. Elephas, (_el´e-fas_). 4. Palæotherium, (_pā-lē-ō-thē´-ri-um_).
5. Pterodactyl, (_ter-ō-dak´tīl_). 6. Ammonites, (_am´mo-nitz_).
7. Plesiosaurus, (_plē-zi-ō-saw´rus_). 8. Ichthyosaurus, (_ik-thi-
ō-saw´rus_). 9. Carboniferous, (_kär’bŏn-ĭf´ēr-ŭs_) fern.
10. Lepidodendron, (_lep-ī-dō-den´dron_). 11. Calamites, (_kal´a-mits_
or _kal´a-mī´tēz_). 12. Labyrinthodon, (_lab-i-rin´thō-don_).
13. Acanthodus, (_a-kan-thō´dus_). 14. Diplacanthus, (_dip-la-kan´
thus_). 15. Lepidosteus, (_lep-i-dos´te-us_). 16. Climatius, (_clī-
măi´tē-us_). 17. Zosterites, (_zos-ter-i´tēz_). 18. Goniatites, (_gō-
ni-a-tī´tēz_). 19. Strophomena, (_strō-phŏm´ĕ-na_).