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Details Title: Mr. Drake- Earth history Description: chapter 15 Total Flash Cards: 39 Created: 04/23/2007 15:15:00	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Cenozoic, mesozoic, paleozoic Definition what are the three major eras? Term recent life, began 65 million years ago Definition Cenozoic Term Waht are the two periods of cenozoic? Definition Quaternary Tertiary Term What happened during tertiary period- Definition flowering palts, apes elephants appear, primative horses ALantic ocean widens ALps and Himalaya form India collides with asia Term Quaternary period Definition Humans became dominant, ice age Term mesozoic Definition intermediate life, began 225 million years ago and laster 160 million years. Term paleozoic Definition ancient life began 570 million years ago and laster 345 million years Term precambrian time Definition 7/8 of earths hisotry- not much is known about this era includes paleozoic Term periods Definition the times of extinction are used to divide geologic history into . Term 4.5 billion years Definition when did the earth come into being? Term 3.6 billion years ago Definition when did living things fluorish? Term paleozoic era Definition -rise of reptiles, large insects -large nonflowering plants in enormous swamps, amphibians, sharks -first land plants, large coral reefs -marine invertebrates with shells Term invertebrates Definition creatures without inter skeletons but with external shells Term intense tectonic activity. Definition how did paleozoic era end? Term ancient swamp Definition what does bed of coal imply? Term paleozoic rocks Definition where is coal plentiful? Term 50% cenozoic 25% mesozoic and the rest in paleozoic Definition what % of coal was formed in each era? Term 225 million years ago Definition earliest mesozoic sediments laid down Term Pangaea split into laurasia and gondwana Definition What happened to contients during mesozoic period? Term dinosaurs and small mammals towards the end of the era Definition What animals were prominent in mesozoic era? Term a mass extinction Definition What divides mesozoic from cenozoic era? Term almost continual in contrast with other periods Definition has cenozoic era have tectonic disturbances Term Himalays of asia Alps of Europe folding and uplifting of rocks Definition What mountain ranges were formed in the Tertiary in the mesozoic era? HOw? Term Great ice age Definition wahted happened during pleistocene? Term precamberian, paleozoic, mesozoic, and cenozoic era. Definition Arrange the geological time in order Term of the same kinds as those of the present time Definition Ancient geological processes reval in precambrian strata were... Term pleozoic Definition coal desposits were formed during Term mesozoic era Definition laurasia and gondwana broke up in the Term there were several glacial advances and retreats Definition during the ice age Term super position Definition undisturbed sedimentary rock is older the lower you get Term cross cutting principle Definition igneous magma that cuts through strta. igneous rock is always younger Term relative dating Definition comparring the age of something to the age of another thing Term absolute dating Definition exact age of something (number) Term deposition Definition gets rocks into layers Term law of horizantallity Definition rocks (sedimentary) will be layed down horizontally if no faults/folding Term unconformity Definition any erosion surface creates it... anyrock layer on top does not ..... Term potassium 40, rubidium Definition What radionuclides are used to date rocks? Term principle of uniformitarian Definition instead of one catastrophic event, many shaped the earth to what it is today Term principle of uniformitarian Definition instead of one catastrophic event, many shaped the earth to what it is today