GEOLEX database Geologic Unit: Harlow Bridge Usage: Harlow Bridge Quartzite (VT) Harlow Bridge Quartzite Member of Cram Hill Formation (VT*) Harlow Bridge Quartzite Member of Missisquoi Formation (VT) Age: Ordovician, Middle* Geologic Province: New England province* Areal Extent: VT* Type Locality: Vicinity of large railroad bridge (Harlow Bridge) 2.4 miles south-southwest of Northfield, Barre quadrangle, Washington Co., VT (Currier and Jahns, 1941). Unit Name History: Named in Cram Hill Formation (Currier and Jahns, 1941). Assigned to Missisquoi Formation (Doll and others, 1961). Raised to formation rank (Westerman, 1987). 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