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Geology of Illinois

Geology of Illinois. Garden of the Gods – Shawnee Hills. Apple River, Near Galena. Mississippi Palisades, Savannah, IL. Rockford, Illinois. Starved Rock State Park. Major cycles of variation in temperature. Causes of 100,000 year cycle in temperature variation. Earth during Wisconsinian

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Geology of Illinois

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  1. Geology of Illinois Garden of the Gods – Shawnee Hills

  2. Apple River, Near Galena

  3. Mississippi Palisades, Savannah, IL

  4. Rockford, Illinois

  5. Starved Rock State Park

  6. Major cycles of variation in temperature

  7. Causes of 100,000 year cycle in temperature variation

  8. Earth during Wisconsinian glaciation

  9. Wisconsinian Glaciation

  10. Wisconsinian vs. Today

  11. Glacial Landforms – North America

  12. Glacial Moraines

  13. Glacial Deposits • Glacial till - unsorted, unstratified mixture of clay, silt, sand and cobbles deposited directly by glaciers - glaciers pick up tremendous amounts of sediment and rock • Glacial drift - the general term for sediment and rock left by glaciers is drift - deposits of clay, silt, sand, gravel and boulders left by glaciers or their meltwater streams

  14. Exposed glacial till

  15. Glacial Drift at Fox River Stone Company – St. Charles, IL – 100 feet of drift over bedrock

  16. Illinois River Valley

  17. Glacial Moraines

  18. Moraines in Illinois – Wisconsinian Glacier

  19. Moraine View State Park

  20. Moraine on Illinois Hwy 4

  21. Recent Geology - Illinois

  22. Endangered Wetland Regions and Endangered Species

  23. Prairie pothole ponds and marshes

  24. Prairie pothole ponds and marshes

  25. Drainage Ditches

  26. Installing drainage tiles

  27. Glacial erratic in Alberta

  28. Glacial Erratic – New York

  29. Exposed Loess Deposit

  30. Glacial Landscape – Cross-section

  31. Glacial Landscape – McHenry County, IL

  32. Illinois Climate

  33. Mean Monthly Temperatures – Urbana, Illinois – 1961-2000

  34. Pollen Data – from Nova Scotia

  35. Tree Distributions – Post-Glacial

  36. Cyclical climate and ecological change at Billy’s Lake, MN • 10,000 to 8020 BP - jack pine, red pine forest with some oaks • 8020 to 3400 BP - grassy prairies with sage (5000 to 4000 BP) and with oak after that • 3400 to 1000 BP - deciduous forest - oak-grass to oak-birch to birch-hornbeam • 1000 BP to present - pine forest - birch-white pine

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