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Cross-sectioned "pillow" (soft sediment deformation) of sandstone with internal (deformed) laminations from Corridor H, West Virginia. Devonian Hampshire Formation. The sample was collected at the same site as this outcrop GigaPan: www.gigapan.com/gigapans/111262 The sand was deposited atop squishy mud, then s...
This roadcut perserves ripple marks that are now nearly two billion years old. Tilted during the Penokean Orogeny, these rocks are also some of the oldest redbeds (evidence of an atmosphere with free oxygen) in the world.