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Intro- The Ice Age in Utah

Discover the ancient Ice Age in Utah, 10,000 to 30,000 years ago. Dive into the world of Lake Bonneville, glaciers, and prehistoric life in Utah's Quaternary period. Explore the geological shifts and Ice Age creatures that once roamed the region. Witness the rise and fall of Lake Bonneville and the surrounding landscapes. Uncover the remnants of this icy past in the modern Utah wilderness.

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Intro- The Ice Age in Utah

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  1. Intro- The Ice Age in Utah 18,000 years ago . in Utah The Ice Age in Utah The landscape and life in Utah during the most recent Ice Age in Utah 10,000 to 30,000 years ago. Salt Lake City Lake Bonneville glaciers

  2. Ice Age Ice Age Ice Age Ice Age 22° 12° 17° Quaternary Ice Ages Throughout Geologic Time Figure modified after C.R. Scotese PALEOMAP Project (www.scotese.com) Average Global Temperature (0C)

  3. C.R. Scotese, PALEOMAP Project, (www.scotese.com) Last Glacial Maximum 18,000 years ago

  4. Milankovitch Cycles Eccentricity 90,000 to 100,000 years Precession 19,000 to 23,000 years ~5% ~0% Obliquity (Axial Tilt) 41,000 years Figures modified after Matt Beedle, Montana Sate University.

  5. Lake Bonneville and Ice Coverage in Utah During the Late Pleistocene~18,000 years ago Lake Bonneville Uinta Mountains Wasatch Range

  6. Lake Bonneville~18,000 years ago Salt Lake Delta Utah

  7. 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

  8. Stansbury Shoreline Red Rock Pass ID NV UT Ogden Salt Lake Provo Nephi Delta ~24,000 years ago Stansbury Island

  9. BonnevilleShoreline Red Rock Pass ID NV UT Ogden Salt Lake Provo Nephi Delta ~18,000 years ago Point of the Mountain

  10. Provo Shoreline Red Rock Pass ID NV UT Ogden Salt Lake Provo Nephi Delta ~17,000 years ago

  11. Gilbert Shoreline Red Rock Pass ID NV UT Ogden Salt Lake Provo Nephi Delta ~12,000 years ago

  12. Great Salt LakeToday Red Rock Pass ID NV UT Ogden Salt Lake Provo Nephi Delta

  13. Shorelines of Lake Bonneville at Antelope Island Bonneville Provo Unnamed shoreline Stansbury Gilbert Unnamed shoreline

  14. Bonneville Shoreline at Point of the Mountain Paragliders

  15. Bonneville Shoreline at Point of the Mountain Bonneville Shoreline at the “U”

  16. Stockton Bar, Utah Kiawah Island, South Carolina Lake Bonneville Barrier Bar and Spit Modern Barrier Bar and Spit

  17. Lake Bonneville Spits Younger spit Contact surface Older spit

  18. Lake BonnevilleDeep-Water Sediments Laminations

  19. Tufa on the Provo Shoreline Tufa on Quartzite

  20. Lake Bonneville Delta Sediment Transport Direction

  21. Provo ShorelineWave-Cut Platform Wave Direction

  22. Bonneville Salt Flats Bonneville Shoreline Provo Shoreline Salt

  23. Modern GlaciersAlaska Devil’s Desk Glacier Halo Glacier, Cook Inlet

  24. Holgate Glacier, Alaska

  25. Glacial Cirques Uinta Mountains Glacial Cirque Glacial Cirque Convict Lake, Sierra Nevada Mountains

  26. U-shaped Glacial Canyons Yosemite Valley Little Cottonwood Canyon Glacier National Park

  27. Mill Creek Canyon“V-shaped” Stream- eroded canyon Little Cottonwood Canyon“U-shaped” Glacier- eroded canyon

  28. Glacial Sceneryat Alta, Utah Arêtes U-shaped Valley

  29. MorainesChugach Mountains,Alaska Medial Moraine Image by Bruce Molnia, Terra Photographics Image by Michael Collier

  30. Glacial Features at Little Cottonwood Canyon Trimline Moraines U-Shaped Valley Fault Scarps

  31. Bells Canyon, Utah Lateral Moraine Fault Scarp

  32. Glacial Erratics Voyageurs National Park, Minnesota Denali National Park, Alaska Person

  33. Little Cottonwood Canyon Glacial Erratics

  34. Glacial Polish and Grooves Grooves and polish on bedrock Glacier National Park, Montana Striations

  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 Today are isolated in streams that once drained into Lake Bonneville. Known Distribution

  40. Utah’s Giant Ice Age Birds Teratornis- “giant condor” Endangered California Condor Teratornis skeleton Teratornis skull

  41. Ice Age Land Bridges and Mammal Migrations

  42. Ice Age Elephants Mammoth Mastodon The Huntington Mammoth (Mammathus columbi) skeleton at the CEU Prehistoric Museum Detail from Joseph S. Venus mural, College of Eastern Utah (CEU) Prehistoric Museum, Price, Utah

  43. 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.

  44. Saber-toothed Cat Smilodonfatalis Skeletal reconstruction and detail from Joseph S. Venus mural, CEU Prehistoric Museum, Price, Utah

  45. Giant Ground Sloth Skeletal reconstruction and detail from Joseph S. Venus mural, CEU Prehistoric Museum, Price, Utah

  46. 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

  47. Mountain mammals that lived in Ice Age Lowlands The wolverine, Gulo gulo TheAmerican pika, Ochotona princeps,

  48. 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 Earth’s 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 20. Lake Bonneville Delta 21. Provo Shoreline Wave Cut Platform 22. Bonneville Salt Flats 23. Modern Glaciers - Alaska 24. Holgate Galcier, Alaska 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. Utah’s Giant Ice Age Birds 41. Ice Age Land Bridges and Mammal Migrations 42. Ice Age Elephants 43. Mammoth and Elephants vs. Mastodons 44. Saber-toothed Cat 45. Giant Ground Sloth 46. Other Extinct Ice Age Mammals 47. Mountain Mammals that lived in Ice Age Lowlands Power Point Presentation (list of slides)

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