GEOL 107 Study Guide - Final Guide: Burgess Shale, Pikaia, Devonian
6 Sep 2016
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Cenozoic (65 ma-present): acme of mammals, birds, and flowering plants. First monkeys, first whales, first bats, evolutionary radiation of mammals. Marine reptiles, first dinosaurs, evolutionary radiation of flowering plants, naked-seed plants dominate the land, first mammals, first birds, first turtles, pterosaurs. Frogs, modern amphibians, turtles, pleisiosaurs, ichthyosaurs, marine reptiles, appear. Dinosaurs appeared at the beginning of late. Paleozoic (540-250 ma): age of trilobites, brachiopods and other archaic invertebrates in the seas. First land plants, amphibians and reptiles occur late in this era. Widespread coal swamps, first insects, first jawed fishes, first reptiles, vertebrates invade the land, evolutionary radiation of marine invertebrates with skeleton. Shallow sea-bottom dominated by filter-feeders, such as brachiopods, bryozoans, corals. Dominant terrestrial flora: lycopods and various fern-like groups. The period in which fish invaded freshwater environment and the first tetrapods walked on land. Cambrian explosion resulted in skeletons and brains. Trilobites dominant group of the cambrian and slowly declined through.
