schoharie grit

from The Century Dictionary.

• In geology, in the nomenclature of the New York Geological Survey, an unimportant division of the Devonian series, lying between the cauda galli grit and the Upper Helderberg group.

from the GNU version of the Collaborative International Dictionary of English.

• (Geol.) The formation belonging to the middle of the three subdivisions of the Corniferous period in the American Devonian system; -- so called from Schoharie, in New York, where it occurs. See the Chart of geology.