GEOLEX database Geologic Unit: Hoppin Usage: Hoppin Formation (MA*) Age: Cambrian, Early* Geologic Province: New England province* Areal Extent: MA* Type Locality: Exposed at Hoppin Hill, North Attleboro, eastern MA (Emerson, 1917). Unit Name History: Named Hoppin Slate (Emerson, 1917). Revised to Hoppin Formation; Age modified (Goldsmith and others, 1982). MA State Geol. Map usage (Zen and others, 1983). Abandoned (Landing, 1988). Overview (Goldsmith, 1991). Age modified (Rankin and others, 1993). 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