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The Black Belt is a region of the U.S. state of Alabama, and part of the larger Black Belt Region of the Southern United States, which stretches from Texas to Maryland. The term originally referred to the region underlain by a thin layer of rich, black topsoil developed atop the chalk of the Selma Group, a geologic unit dating to the Cretaceous Period. The soils have been developing continuously at least since the Pliocene Epoch. Because the underlying chalk is nearly impermeable to groundwater, the black soils tend to dry out during the summer. The natural vegetation of the chalk belt consisted mainly of oak-hickory forest interspersed with shortgrass prairie, while the sandy ridges flanking the chalk belt supported pine forest. For lack of a reliable source of water, the earliest settlers avoided farming the black soil until the discovery that deep artesian wells could be drilled to supply people, livestock, and crops. Beginning in the 1830s, cotton plantations became Alabama's greatest source of wealth. ... Read more

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High Quality Content by WIKIPEDIA articles! Piedmont is a plateau region located in the eastern United States between the Atlantic Coastal Plain and the main Appalachian Mountains, stretching from New Jersey in the north to central Alabama in the south. The Piedmont province is a physiographic province of the larger Appalachian division. The province consists of the Piedmont Upland and Piedmont Lowlands sections. The Fall line marks its eastern boundary with the Coastal Plain. To the west, the Piedmont is mostly bounded by the Blue Ridge Mountains, the easternmost range of the main Appalachians. Physiographically, the Piedmont is considered a province of the larger Appalachian Highlands physiographic division. The width of the Piedmont varies, being quite narrow above the Delaware River but nearly 300 miles (475 km) wide in North Carolina. The Piedmont's area is approximately 80,000 square miles (207,000 km²). ... Read more