Transcript Chapter 24
Chapter 24 The Mesozoic and Cenozoic Eras Mesozoic Era Cover Jacks Three Triassic Environment Rocky Mountains begin Present-day _______ to form Jurassic Environment Atlantic -modern ________ Ocean opening and Tethys Sea closing -____________ Shallow seas cover much of North America -Gulf of Mexico forms -terrane collisions along west _____ coast Triassic and Jurassic Life cycads ________ – seed plants without flowers Conifers Ferns Ginko biloba – ______ present day species leaf nearly identical to Mesozoic ancestor Cretaceous Life angiosperms (flowering plants) First _____________ insects Coevolution of pollinating _________ Cretaceous Environment temperature Steady drop in global ______________ seas Widespread continental _____ Warm, moist climate _____________ oil Gulf coast _____ deposits form ___________ Chicxlub Crater -___ 65 million years ago -_____________ meteorite impact 10k diameter -massive volcanism -both created ________ iridium rich rock found worldwide at Cretaceous-Paleogene boundary ultraviolet radiation; -___________ greenhouse warming; already stressed ecosystem -79% marine;15% land species ___________ extinct Queens Two (Neogene and Paleogene are often grouped together as Tertiary _________ Period) Paleocene Environment -Tethys Sea closes -before ________ Africa collided with _________ the Eurasia Tethys Sea separated them Eocene Life Green River -_____________ Formation, Wyoming -large basins formed adjacent Rocky to ________ Mts and filled with river sediments -produced large deposits of lowcoal sulfur ______ -enormous gas and oil deposits formed in Middle East Oligocene Environment -Badlands of South Dakota -golden age of mammals ________ Oligocence and Miocene Epochs Basin and ____________ Range _____Province in Nevada, Utah, and Mexico Fault block -___________ mountains form from tensional forces in southwest US Pliocene and Pleistocene Epochs Woolly mammoth -______________, _______________, dire wolf ____________cat sabre-toothed evolved ability to survive cold -series of major ice ages in the _____________ Pleistocene -hominids appear 4 to 5 mya ________ -modern humans .3 appear _____ mya Holocene Epoch Great Lakes form glaciers Last continental _________ retreat from United States Faulting in Basin and Range Province ____________ activity in Cascades and Volcanic Yellowstone San Andreas Fault movement Holocene Epoch (continued) fossil fuels Burning of ____________ and removal of large _________ increases carbon forests dioxide levels and global temperature three degrees C since 1880 overpopulation Human ________________ begins to deplete food sources, mineral and fossil fuel resources, and decrease biodiversity Evolution How are these animals similar and how are they different? What causes them to evolve? environmental change