Chapter 24
The Mesozoic and Cenozoic Eras
Cover
Mesozoic Era
Jacks
Three
Triassic Environment Present-day _______ Mountains
begin to formRocky
Jurassic Environment
-modern ________ Ocean opening and Tethys Sea closing
-____________ cover much of North America
-Gulf of Mexico forms
-terrane collisions along _____ coast
Atlantic
Shallow seas
west
Triassic and Jurassic Life
________ – seed plants without flowers
Conifers
Ferns
cycads
______ biloba – present day species leaf nearly identical to Mesozoic ancestor
Ginko
Cretaceous Life First _____________ (flowering
plants) Coevolution of pollinating _________
angiosperms insects
Cretaceous Environment Steady drop in global
______________ Widespread continental _____ _____________ climate Gulf coast _____ deposits form
temperature
seasWarm, moist oil
___________ Crater -___ 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 ___________
Chicxlub 65
meteorite
iridium
ultraviolet
extinct
Queens
(Neogene and Paleogene are often grouped together as _________ Period)
Two
Tertiary
Paleocene Environment
-Tethys Sea closes
-before ________ collided with _________ the Tethys Sea separated them
Africa
Eurasia
Eocene Life-_____________ 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
Green River
Rocky
coal
Oligocene Environment
-Badlands of South Dakota
-golden age of ________mammals
Oligocence and Miocene Epochs
_________________Province in Nevada, Utah, and Mexico
-___________ mountains form from tensional forces in southwest US
Basin and Range
Fault block
Pliocene and Pleistocene Epochs -______________,
_______________,____________ evolved ability to survive cold
-series of major ice ages in the _____________-hominids appear ________ mya-modern humans appear _____ mya
Woolly mammothdire wolf
sabre-toothed cat
Pleistocene
4 to 5
.3
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
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 fuelsforests
overpopulation
Evolution
How are these animals similar and how are they different?
What causes them to evolve?
environmental change
