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Physiographic Regions Within the U.S., geographers have identified over 30 natural regions. These regions, called physiographic provinces are based on similarities in land formations, elevation, location, and use of the land…among other things. Coastal Plain Largest region in Georgia During prehistoric times, this region was covered by ocean As the water moved inland, it created hills and other landforms The seashells and other aquatic life sank to the seafloor, creating soft rock called limestone Coastal Plain (cont.) Over time, rivers and streams deposited rocks and clay that eroded from the mountains. As a result, thousands of feet of sediment -settled deposits - covered the ocean floor Ocean retreated leaving limestone, clay and sediment deposits This region is known as… The Coastal Plain! It extends from along the Atlantic and Gulf Coasts from Massachusetts to Mexico The interior boundary of the coastal plain is marked by the Fall Line. This line is actually a zone - the prehistoric shoreline The land north of it is higher in elevation, causing rivers and streams to pick up speed as they move south Home to Okefenokee Swamp - largest swamp in North America. THE COASTAL PLAIN Relative Location Physical Features Land Use Elevation -60 % of GA -Atlantic & Gulf Coasts from Mass to Mexico -200 miles inland -flat, low lying gentle slope -Okefenokee Swamp -barrier islands agriculture, pasture, pine trees 1 - 500 feet above sea level The Piedmont -Georgia’s 2nd largest province -French word for “foot of the mountains” -500 - 1700 feet above sea level Rolling hills with many valleys Hills can be tall and mistaken for mountains Hardwood and pine trees found here Land will support crops like cotton, soybeans and wheat - While the Coastal Plain has Limestone, the Piedmont has bedrock (granite,gneiss, marble,etc)…which is very hard. - Bedrock is easy to be seen when the soil is washed away. Piedmont has many streams and rivers Because of bedrock, they have shallow beds Exposed rocks create frequent rapids, making navigation impossible for large boats Piedmont Relative Location Physical Features Land Use Elevation -2nd largest -So. Of Blue ridge --30 % of GA Hills Valleys Streams and rivers Hardwood and pines Cotton soybeans wheat Granite Marble 500-1700 feet above sea level Blue Ridge Georgia’s most beautiful physiographic province The Blue Ridge Mountains…the highest in the Appalachian Highlands The Blue Ridge region stretches from Georgia to Pennsylvania Georgia’s Highest Mountain Brasstown Bald is 4,784 feet above sea level Springer Mtn (3782 ft) is the beginning of the Appalachian Trail The App. Trail is 2158 miles long. Blue Ridge The height of the mountains cools the warm air currents coming from the Gulf of Mexico. This produces rain throughout the year! Less than 1% of Georgia’s farm land Apples, corn, and timber Blue Ridge Relative Location NE Georgia to So. Penn. Physical Features Many rivers, high mts, valleys Land Use Elevation Apple 4784’ Brasstown Corn Bald Hardwood 1% of GA farmland Ridge and Valley Region -In Georgia, located west of Blue Ridge -Stretches 1,200 miles from NY to Alabama -Long parallel ridges over looking valleys From the ground, the ridges look like mountains… …But the highest point is only 700-1600 feet from the base Tell me about this region… The Ridge and Valley province is located between the Blue Ridge, Piedmont, and Plateau regions. Consists of softer sedimentary rocks like sandstone (ridges) and limestone and shale (valleys) Ridges covered in forest, Valleys used for pastures and farming Farming in forests??? Well, the valleys actually are not covered in forest, making it moderately suited for farming! - Average growing season of 210220 days - Variety of crops can be grown (corn,soy beans, wheat, cotton) Ridge and Valley Relative Location Physical Features 1200 Ridges miles from and NY to valleys Alabama Soft rock Land Use Elevation farming 700-1600 Appalachian Plateau This is the smallest of the physiographic regions in Georgia. Located in the far northwestern corner of Georgia. Has the only source of coal in Georgia. Known as TAG Corner Appalachian Plateau Relative Location Physical Features Land Use Elevation Northwest corner of Georgia -TAG Corner Caves, canyons, rock formations hardwood Up to forests 2000 feet and pastures
