Windrock sandstone exposed in cross-country sections from Windrock to America Knob. Occurs at top of Anderson formation. Consists of sandstone containing occasional gritty quartz pebbles the size of wheat grains. On American Knob, top of sandstone is 18 ft below summit. Thickness is 40 ft.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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