Black Belt (region of Alabama)
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Black Belt (region of Alabama)

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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 consist...