1. The Mesozoic and Cenozoic Eras
Chapter 24
The Mesozoic and Cenozoic Eras

2. Mesozoic Era
Cover
Jacks
Three

3. Triassic Environment
Present-day _______ Mountains begin to form
Rocky

4. Jurassic Environment
Atlantic
-modern ________ Ocean opening and Tethys Sea closing
-____________ cover much of North America
Shallow seas
-Gulf of Mexico forms
-terrane collisions along _____ coast
west

5. Triassic and Jurassic Life
cycads
________ – seed plants without flowers
Conifers
Ferns

6. Ginko
______ biloba – present day species leaf nearly identical to Mesozoic ancestor

7. Cretaceous Life angiosperms First _____________ (flowering plants)
Coevolution of pollinating _________
insects

8. Cretaceous Environment
Steady drop in global ______________
Widespread continental _____
_____________ climate
Gulf coast _____ deposits form
temperature
seas
Warm, moist
oil

9. ___________ Crater Chicxlub -___ million years ago
-_____________ impact 10k diameter
-massive volcanism
-both created ________ rich rock found worldwide at Cretaceous-Paleogene boundary
-___________ radiation; greenhouse warming; already stressed ecosystem
-79% marine;15% land species ___________ 65
meteorite
iridium
ultraviolet
extinct

10. Queens
Two
(Neogene and Paleogene are often grouped together as _________ Period)
Tertiary

11. Paleocene Environment
-Tethys Sea closes
-before ________ collided with _________ the Tethys Sea separated them
Africa
Eurasia

12. Eocene Life Green River -_____________ Formation, Wyoming
-large basins formed adjacent to ________ Mts and filled with river sediments
-produced large deposits of low-sulfur ______
-enormous gas and oil deposits formed in Middle East
Eocene Life
Rocky
coal

13. Oligocene Environment
-Badlands of South Dakota
-golden age of ________
mammals

14. Oligocence and Miocene Epochs
Basin and Range
_________________Province in Nevada, Utah, and Mexico
-___________ mountains form from tensional forces in southwest US
Fault block

15. Pliocene and Pleistocene Epochs
Woolly mammoth
-______________, _______________,____________ evolved ability to survive cold
dire wolf
sabre-toothed cat
-series of major ice ages in the _____________
Pleistocene
-hominids appear ________ mya
4 to 5
-modern humans appear _____ mya .3

16. Holocene Epoch Great Lakes form
Last continental _________ retreat from United States
Faulting in Basin and Range Province
____________ activity in Cascades and Yellowstone
San Andreas Fault movement
glaciers
Volcanic

17. Holocene Epoch (continued)
Burning of ____________ and removal of large _________ increases carbon dioxide levels and global temperature three degrees C since 1880
Human ________________ begins to deplete food sources, mineral and fossil fuel resources, and decrease biodiversity
fossil fuels
forests
overpopulation

18. Evolution How are these animals similar and how are they different?
What causes them to evolve?
environmental change