Intro The Ice Age in Utah

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Intro- The Ice Age in Utah
18,000 years ago . in Utah
The Ice Age in Utah The landscape and life in Ut
ah during the most recent Ice Age in Utah 10,000
to 30,000 years ago.
Salt Lake City
Lake Bonneville
glaciers
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Ice Ages Throughout Geologic Time
Quaternary
Figure modified after C.R. Scotese
PALEOMAP Project (www.scotese.com)
Average Global Temperature (0C)
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Last Glacial Maximum 18,000 years ago
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Milankovitch Cycles

















Eccentricity 90,000 to 100,000 years
Precession 19,000 to 23,000 years
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0
Obliquity (Axial Tilt) 41,000 years
Figures modified after Matt Beedle, Montana Sate
University.
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Lake Bonneville and Ice Coverage in Utah During
the Late Pleistocene18,000 years ago
Lake Bonneville
Uinta Mountains
Wasatch Range
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Lake Bonneville18,000 years ago
Utah
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The Rise and Fall of Lake Bonneville
Provo Level 17,000 years ago
Great Salt Lake today
Bonneville Level 18,000 years ago
Gilbert Level 12,000 years ago
Hydrograph of Lake Bonneville
Stansbury Level 24,000 years ago
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Stansbury Shoreline
Red Rock Pass
24,000 years ago
Stansbury Island
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BonnevilleShoreline
18,000 years ago
Point of the Mountain
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Provo Shoreline
17,000 years ago
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Gilbert Shoreline
12,000 years ago
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Great Salt LakeToday
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Shorelines of Lake Bonneville at Antelope Island
Bonneville
Provo
Unnamed shoreline
Stansbury
Gilbert
Unnamed shoreline
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Bonneville Shoreline at Point of the Mountain
Paragliders
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Bonneville Shoreline at Point of the Mountain
Bonneville Shoreline at the U
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Stockton Bar, Utah
Lake Bonneville Barrier Bar and Spit
Kiawah Island, South Carolina
Modern Barrier Bar and Spit
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Lake Bonneville Spits
Younger spit
Contact surface
Older spit
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Lake BonnevilleDeep-Water Sediments
Laminations
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Tufa on the Provo Shoreline
Tufa on Quartzite
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Lake Bonneville Delta
Sediment Transport Direction
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Provo ShorelineWave-Cut Platform
Wave Direction
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Bonneville Salt Flats
Bonneville Shoreline
Provo Shoreline
Salt
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Modern GlaciersAlaska
Devils Desk Glacier
Halo Glacier, Cook Inlet
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Holgate Glacier, Alaska
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Glacial Cirques
Uinta Mountains
Glacial Cirque
Glacial Cirque
Convict Lake, Sierra Nevada Mountains
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U-shaped Glacial Canyons
Yosemite Valley
Little Cottonwood Canyon
Glacier National Park
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Mill Creek CanyonV-shaped Stream- eroded canyon
Little Cottonwood CanyonU-shaped Glacier-
eroded canyon
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Glacial Sceneryat Alta, Utah
Arêtes
U-shaped Valley
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Moraines Chugach Mountains, Alaska
Medial Moraine
Image by Bruce Molnia, Terra Photographics
Image by Michael Collier
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Glacial Features at Little Cottonwood Canyon
Trimline
Moraines
U-Shaped Valley
Fault Scarps
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Bells Canyon, Utah
Lateral Moraine
Fault Scarp
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Glacial Erratics
Voyageurs National Park, Minnesota
Denali National Park, Alaska
Person
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Little Cottonwood Canyon
Glacial Erratics
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Glacial Polish and Grooves
Grooves and polish on bedrock Glacier National Pa
rk, Montana
Striations
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Life in Utah During the Ice Age
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Life in Utah at the end of the Ice Age
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Assorted Lake Bonneville Mollusks
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Hunting for Gastropods(Snails)
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Bonneville Cutthroat Trout
Today are isolated in streams that once drained
into Lake Bonneville.
Known Distribution
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Utahs Giant Ice Age Birds
Teratornis- giant condor
Endangered California Condor
Teratornis skeleton
Teratornis skull
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Ice Age Land Bridges and Mammal Migrations
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Ice Age Elephants
Mammoth Mastodon
The Huntington Mammoth (Mammathus columbi) skele
ton at the CEU Prehistoric Museum
Detail from Joseph S. Venus mural, College of
Eastern Utah (CEU) Prehistoric Museum, Price, Utah
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Mammoth Elephants vs. Mastodons
Elephants and mammoths have high skulls, while
mastodons have low skulls.
Columbian Mammoth (M. columbi)
American Mastodon (Mammut americanum)
Elephants and mammoths have low, highly enfolded
teeth for grazing, while mastodons have high
crested teeth for browsing leaves.
Elephants and mammoths are tall, while mastodons
are shorter with more massive bodies.
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Saber-toothed Cat
Smilodon fatalis
Skeletal reconstruction and detail from
Joseph S. Venus mural, CEU Prehistoric
Museum, Price, Utah
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Giant Ground Sloth
Skeletal reconstruction and detail from Joseph S.
Venus mural, CEU Prehistoric Museum, Price, Utah
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Other Extinct Ice Age Mammals
Extinct Long-Horned Bison
Extinct Musk Ox
Camels, together with native horses, went extinct
in North America at the end of the Ice Age
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Mountain mammals that lived in Ice Age Lowlands
The American pika, Ochotona princeps,
The wolverine, Gulo gulo
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Power Point Presentation (list of slides)

• 1. Intro the Ice Age in Utah
• 2. Ice Ages Throughout Geologic Time
• 3. Last Glacial Maximum 18,000 years ago
• 4. Milankovitch Cycles Changes in Earths Orbit
• 5. Lake Bonneville and Ice Coverage in Utah
  18,000 yrs ago
  
• 6. Lake Bonneville 18,000 years ago
• 7. The Rise and Fall of Lake Bonneville
• 8. Stansbury Shoreline 24,000 years ago
• 9. Bonneville Shoreline 18,000 years ago
• 10. Provo Shoreline 18,000 years ago
• 11. Gilbert Shoreline 12,600 years ago
• 12. Great Salt Lake - Today
• 13. Shorelines of Lake Bonneville on Antelope
  Island
  
• 14. Bonneville Shoreline at Point of the
  Mountain
  
• 15. Bonneville Shoreline at U and Point of the
  Mountain
  
• 16. Stockton Bar, Utah
• 17. Lake Bonneville Spits
• 18. Lake Bonneville Deep Water Sediments
• 19. Tufa on the Provo Shoreline

• 25. Glacial Cirques
• 26. U-shaped Glacial Canyons
• 27. U-shaped and V-shaped Canyons
• 28. Glacial Scenery at Alta, Utah
• 29. Moraines on the Juneau Icefield, Alaska
• 30. Glacial Features at Little Cottonwood Canyon,
  Utah
  
• 31. Bells Canyon, Utah
• 32. Glacial Erratics
• 33. Little Cottonwood Canyon Glacial Erratics
• 34. Glacial Polish and Grooves
• 35. Life in Utah during the Ice Age
• 36. Life in Utah at the end of the Ice Age
• 37. Assorted Lake Bonneville Mollusks
• 38. Hunting for Gastropods (Snails)
• 39. Bonneville Cutthroat Trout
• 40. Utahs Giant Ice Age Birds
• 41. Ice Age Land Bridges and Mammal Migrations
• 42. Ice Age Elephants
• 43. Mammoth and Elephants vs. Mastodons