u.s. geography. u.s. geography breakdown broken into 7 regions: 1.the atlantic-gulf coastal plain...
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U.S. Geography
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U.S. Geography Breakdown
• Broken into 7 regions:
1. The Atlantic-Gulf Coastal Plain
2. Appalachian Highlands3. Interior Plains4. Interior Highlands5. Rocky Mountain System6. Intermountain Region7. Pacific Mountain System
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U.S. Geography Shapes
• The terrain of the northern United States was formed by continental ice sheets
• Mountains and lakes were formed by glaciers
• Rivers came from glacial runoff as the world became warmer
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The East and Gulf Coast
• The Atlantic- Gulf Coast plain runs from SE MA to the Rio Grande River in TX
• This region is consists of:1. Estuaries 5. Sandspits2. Embankments 6. Lagoons3. Islands 7. Bays4. Harbors
• The Atlantic Coastal Plain rises into the Piedmont – an area of rolling hills between the coast and Appalachian Mountains
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Interior Plains and Highlands
• Extend over 1,000 miles from the Appalachian Mts. to the Rocky Mts.
• Once covered by an inland sea and comprised of sedimentary rock
• Drained by the Mississippi and Missouri River
• Divided into 2 regions:1. Central Lowlands2. Great Plains
• The BLACK HILLS are the region’s only upland area
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Western Mts. And Great Basin
• Rocky mountain system divided into 4 sections:1. Northern Rockies2. Middle Rockies3. Wyoming (Great Divide)
Basin4. Southern Rockies
• Continental Divide: A drainage divide where water is drained to a different sea on each side
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Western Mts. And Great BasinContinued
• Intermountain Region: Lies between the Rockies and Coastal Ranges
• Comprised of:1. Plateaus2. Basins3. Ranges
• This region includes the Colorado Plateau which is where the Grand Canyon formed from the Colorado River
• Lowest point in N. America is Death Valley
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Pacific Mountain System
• Made up of 2 ranges:1. Cascade Mts.2. Sierra Nevada Mts.
• These mountains were formed from faulting and volcanism
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The Pacific
• The Pacific coast lies along the San Andreas Fault from San Francisco, CA to NW Mexico
• It is a Coastline of Emergence – Often the mountains plunge directly into the sea and there are few islands or quality harbors
• Major Harbors Include:1. Puget Sound2. San Francisco3. San Diego
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Alaska and Hawaii• Alaska is Broken into 4 regions:
1. Arctic Lowlands2. Rocky Mountain System3. Central Basins and Highlands4. Pacific Mountain System
• Much of the Pacific Mountain System is high in volcanic activity
• The Hawaiian Islands make up part of the Pacific Mt. System and are mainly extinct volcanoes except for Mauna Kea and Mauna Loa (both on Hawaii)
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Major Rivers and Lakes• The Mississippi-Missouri River system is the
longest in the U.S. (3890 mi. long)
– Major Tributaries Include:1. Red River2. Ohio River3. Arkansas River
• The Great Lakes are the largest in North America– Superior, Michigan, Huron, Erie, Ontario
• Great Salt Lake and Lake Lliamna are the largest outside the great Lakes