GEOLEX database Geologic Unit: Hitchcock Usage: Hitchcock Volcanics of Newark Supergroup (MA*) Age: Jurassic, Early* Geologic Province: New England province* Hartford basin* Areal Extent: MA* Type Locality: Crops out on the north and west slopes of Mount Hitchcock, Holyoke Range, Mount Holyoke quadrangle, Hampshire Co., MA (Robinson and Luttrell, 1985). Unit Name History: First used (Bain, 1941). Named (Brophy and others, 1967). Revised; Age modified (Robinson and Luttrell, 1985). Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov). Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys. "No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses (). Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]). U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html Database project personnel Last modified: 7-Jan-2007