NATS 1540 Study Guide - Midterm Guide: Silurian, Rodinia, Atlantic Ocean
24 May 2015
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Sea levels rise to submerge about 30% climate is warm. Dinosoars and large reptiles are dominant vertebrae (horned are common) spiky nodosaurs. Mass exstinction of dinosaurs at end of period. Tectonic plates cause earths crust to fold and forms montains. Archaeopteryx the first bird evolves, dinosaurs are dominant. Continental rifting near end of period begins to break continent apart. Marine life is rich but towards end mass exstiction occurs among corals, bryoans and other invertebreaes. Reptiles go through evolution and form carnivors, herbevours, Laurasia(north america, greenland,eurasia) to north of the equator and gondwana(south america, afica, india, austrailia, and antartica) Africa and south america are loacted over south pole. Diversification of fish, and armored fish become exstinct. Ammonites eveolve form nauttiloids and become dominant invertabrate forms. Ozone layer forms and the first air breathing anthropods form, spiders. North american, and asian land masses are near equator. Barren continents of laurentia, baltica, siberia are seperated by large oceans.
