Edwards Plateau: A Geologic Region at the Heart of Texas

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The rocks beneath the plateau directly affect the landscape. Limestone, found in much of the Texas Hill Country, is a soft, easily dissolved rock, and over time, rainwater wears down limestone until it washes away, exposing granite beneath. These hills and surrounding valleys of the Hill Country are a direct result of limestone washing away. But go further west on the plateau, and you enter a drier, more desert-like environment with less rain. Less rain means less erosion and a flatter landscape until you reach the mountains of west Texas.


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