Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked...
-
Upload
bethany-wood -
Category
Documents
-
view
218 -
download
1
Transcript of Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked...
![Page 1: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/1.jpg)
Chapter 18The Paleogene
World
![Page 2: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/2.jpg)
Guiding Questions• Would life in the Paleogene seas have looked
familiar to modern humans?• Would terrestrial vegetation of the Paleogene
Period also have looked familiar to us?• How similar were terrestrial vertebrate animals of
the Paleocene Epoch to those of the present world?
• What climatic conditions characterized by the Early Eocene world?
![Page 3: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/3.jpg)
23 Million years
65 Million years
![Page 4: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/4.jpg)
Paleogene Life• Paleogene
– Paleocene– Eocene– Oligocene
![Page 5: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/5.jpg)
Paleogene Life• Recovery from
Cretaceous extinctions– Modern life forms– New animals
• Whales
• Sharks
![Page 6: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/6.jpg)
Paleogene Life
• Sandy coasts offer new niches– Sand dollars
evolved from sea biscuits
• Flowering plants expanded– Grasses originated
![Page 7: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/7.jpg)
Paleogene Life• Mammals diversified
– Most modern orders present by Early Eocene
![Page 8: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/8.jpg)
Paleogene Life• Bats present by
early Eocene
![Page 9: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/9.jpg)
Paleogene Life
• Primates evolved in Paleogene– Climbing by Early
Eocene
![Page 10: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/10.jpg)
Paleogene Life• Mammalian
carnivores evolved by mid-Paleogene
![Page 11: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/11.jpg)
Paleogene Life• Earliest horses by
end of Paleocene– Size of small dogs
![Page 12: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/12.jpg)
Paleogene Life• Mammalian species
doubled• Ungulates
– Odd-toed• Horses, tapirs, rhinos
– Even-toed• Cloven-hoofed
goats, sheep, pigs, cattle
![Page 13: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/13.jpg)
Paleogene Life• Early Eocene elephants
– Moeritherium• Earliest
• Pig sized
![Page 14: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/14.jpg)
Paleogene Life
• Mesonychids– Doglike– Size of small bears
• Diatrymas– Huge flightless
birds– Clawed feet and
slicing beaks
![Page 15: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/15.jpg)
Paleogene Life• Few birds with flight
– Most waded– No songbirds
![Page 16: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/16.jpg)
Paleogene Life• Oligocene mammals
– A few horses in North America
– Rhinoceroses
• Paraceratherium
• Largest land mammal of all time
![Page 17: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/17.jpg)
Paleogene Life• Brontotheres
– Rhino-like
![Page 18: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/18.jpg)
Paleogene Life• Carnivores evolved in Eocene
– Saber tooth tiger– Bearlike dogs– Wolflike animals
![Page 19: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/19.jpg)
Paleogene Life• Primates
modernized in Oligocene– Monkeys– Apelike primates
• Aegyptopithecus
![Page 20: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/20.jpg)
Paleogeography• Continents were in modern configuration but closer together• Early Paleogene
– Warm climate• Later cooled
![Page 21: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/21.jpg)
Paleogene Thermal Maximum• Very warm interval of
Paleogene– Abrupt shift in oxygen isotope
ratios in planktonic and benthic organisms
– Rapid temperature increase• Antarctic waters warmed to 18°C
in 3000 years
– Carbon isotopes shift to low levels
• Melting of frozen methane
![Page 22: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/22.jpg)
Paleogene Thermal Maximum
• Also reflected in the flora and fauna– Green River Basin
flora shifted– Mammals migrated
• Bering Strait
• Followed by Eocene ice age
![Page 23: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/23.jpg)
Tectonic Events
• Cordilleran region– Laramide orogeny– New tectonic style
![Page 24: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/24.jpg)
Laramide Orogeny
• Northern segment• Active igneous activity
– Active fold and thrust belt inland
– Quiescent from Great Valley to Colorado Plateau
• Low angle of subduction
![Page 25: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/25.jpg)
Laramide Orogeny• Thrust sheets exposed in Rockies
![Page 26: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/26.jpg)
Laramide Orogeny• Olympic Range began to form
![Page 27: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/27.jpg)
Laramide Orogeny
• Basins form on eastern belt of uplifts– Anticline uplifts
![Page 28: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/28.jpg)
Laramide Orogeny• Easternmost uplift formed Black Hills
![Page 29: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/29.jpg)
Laramide Orogeny• Front Range of the
Rocky Mountains– High elevation– Some from post-
Laramide uplift
• Erosion kept pace with uplift– Broad erosional
surface
![Page 30: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/30.jpg)
Laramide Orogeny
• Yellowstone hot spot– Buried trees in
lavas
• Over 20 successive forests buried
![Page 31: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/31.jpg)
Gulf of Mexico
• Mississippi Embayment– Thick Eocene
segments– Oligocene
regression
• Clastic wedge– Important
petroleum resource
![Page 32: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/32.jpg)
Chesapeake Bay• Largest estuary in
the world• Rubble found just
below 36 M year old fossils
• Sits within circular depression– Impact crater– Shocked grains
![Page 33: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/33.jpg)
Chesapeake Bay
• Toms Canyon– Created by meteor– Associated with
tidal wave and microspherules
![Page 34: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/34.jpg)
Chesapeake Bay• Seismic profiling reveals basin in-filled with
breccia
• Faults create geologic hazard
![Page 35: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/35.jpg)
![Page 36: Chapter 18 The Paleogene World. Guiding Questions Would life in the Paleogene seas have looked familiar to modern humans? Would terrestrial vegetation.](https://reader034.fdocuments.us/reader034/viewer/2022051315/56649edc5503460f94bed5b1/html5/thumbnails/36.jpg)