1. Chapter 6; pages 156 – 172 “The Present Is The Key To The Past”

2. Learning Objectives: Describe differences between major landforms of the U.S.A. Describe formation of folded, upwarped, faultblock, and volcanic mountains Understand how a regions landscape influences human activity Vocabulary: All that stuff above

3. I. Plains Not Planes A. Large, flat areas, often found in the interior regions of continents. 1. Ideal for agriculture as they often have rich fertile soil B. Coastal & Interior Plains = half of the United States land area. 1. Atlantic Plain – formed 70 million years ago 2. Gulf Plain – sediments deposited in deltas 3. Interior – between Rockies & Applachian Mts. a. Bread basket of the world b. Rich soils & horizontal layers of rock

6. Lowlands 2:30 Plains 1:30

7. II. Plateaus A. Flat, raised areas of nearly horizontal rock layers 1. Uplifted from inside the earth. 2. Steep edges 3. Arid landscape = not much water ex. Colorado Plateau

9. Colorado Plateau 2:30 Great Basin & Plateaus 3:0 0

10. III. Mountains – 4 types A. Folded, horizontal pressure usually from continental plates colliding. Ex. Applachian, Northern Rockies,

15. B. Upwarped 1. Blocks of land pushed up by forces inside Earth. Ex. Southern Rockies & Black Hills

18. C. Fault -Block 1. Form along faults. One block forced up and another goes down. Ex. Sierra Nevada & Tetons Mts.

22. D. Volcanic 1. Molten material reaches surface of Earth. 2. Cooled rock builds up layer upon layer