Pedernales Falls State Park Feb 2009
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Pedernales Falls is the park's main attraction and may be viewed from a scenic overlook at the north end of the park. In this area, the elevation of the river drops about 50 feet over a distance of 3000 feet, and the cascading falls are formed by the flow of water over the tilted, stair-step effect of layered limestone. These river limestone belong to the 300-million-year-old Marble Falls formation and are part of the southwestern flank of the Llano uplift. These layers of limestone were tilted by the uplift, then eroded long before early Cretaceous seas of the 100-to-120 million years ago covered this part of Texas and deposited sands, gravels, younger limestone, and marine fossils.