Limestone Exposure, New York

A sign here says, "This quarry is the geological reference locality [that is, the type section] for the Hoyt Limestone, a rock unit that extends around the southeast side of the Adirondacks. A number of Late Cambrian-age fossils are found only here and in Poughkeepsie, New York. Scientists have observed such features as mud cracks and ripple marks in the quarry, showing that this limestone was a product of very shallow seas." Ripples are apparent in the middle, and mudcracks appear in the lowermost beds exposed here.