1. Utah’s Geologic History Prehistoric Land & Animals

2. Cornell Notes:  Set-up Cornell Notes on IN Page73  Title: Shaping the Land  Essential Question: How did Natural Forces shape Utah’s land?

3. Shaping the Land  Wind, water, earthquakes, floods, cold weather & heat have worked together to cause changes in our land.

4. Ancient Seas & Sandstorms  As shallow seas washed away, desert sands compressed into high mountains of sandstone.  After the Ice Age ended, the glaciers melted, forming Lake Bonneville

5. Utah’s Mountains & Plateaus  Pressure from both the Atlantic & Pacific Oceans caused parts of North America to form great peaks, including the Rocky Mountains  Water and wind caused erosion that cut beautiful cliffs & canyons in the rock  Faults, or cracks, formed at weak spots in the Earth’s crust  Underground volcanic activity also caused some parts of the land to rise up to form mountains in southern Utah

6. Our Environment Today  Mudslides, rock slides, floods and earthquakes are evidence that the earth is still changing

7. Fossil Fuels  Utah is rich in fossil fuels such as oil, coal, and natural gas.  Utah’s minerals come from the bodies of many plants and animals, combined with heat and pressure.

8. Utah’s Faults http://utah.ptfs.com/a wweb/main.jsp?flag= browse&smd=1&awdi d=9 http://utah.ptfs.com/a wweb/main.jsp?flag= browse&smd=1&awdi d=9

9. Dinosaurs in Utah  The Mesozoic Era is associated with dinosaurs  Dinosaurs have been found in Jensen, Vernal & Price  1992: a newly discovered dinosaur with huge slashing claws was called the Utahraptor

10. Some Utah Dinosaurs Herbivores  Allosaurus  Tyrannosaurus  Utahraptor Carnivores  Apatosaurus  Stegosaurus  Camptosaurus  Camarasaurus  Diplodocus  Triceratops

12. The Ice Age  During the Ice Age, the temperatures were cooler than today--around 15 degrees on average.  It caused huge sheets of ice called glaciers to cover the Utah mountains.  Utah’s canyons were created by glaciers moving downward from the mountains.

13. The Ice Age  Just like the dinosaurs, a mammoth skeleton was discovered near Huntington Reservoir.

14. End of the Ice Age  As temperatures warmed up during the Ice Age, glaciers melted and the water level rose and one lake covered much of Utah in ancient times: Lake Bonneville.  One remnant of Lake Bonneville is the Great Salt Lake, Utah’s largest body of water.

15. L A K E BONNEVILLE

16. The Great Salt Lake  The Great Salt Lake has enough salt to satisfy the world’s needs for a thousand years  Three things to know about the GSL:  ( a ) no water flows out of it  ( b ) It was once part of an ancient lake  ( c ) It is the largest salt water lake in the western hemisphere.