USGS Visual Identifier
National Geologic Map Database logo GEOLEX database


Geologic Unit: Hounsfield

Usage:
Hounsfield Bentonite [Bed] of Selby Member of Rockland Formation (NY)
Hounsfield Metabentonite [Bed] of Selby Formation (NY)

Age:
Ordovician, Middle
Mohawkian
Rocklandian
Geologic Province:
Appalachian basin


Areal Extent:
NY



Type Locality:
Type section: in small quarry just north of Dexter-Brownville Road at foot of west slope of hill, 2 mi east of Dexter, Jefferson Co., NY. [Named from adjacent Hounsfield Twp.] (Kay, 1930).

Unit Name History:
Named (Kay, 1930).
Areal limits (Kay, 1931).
Revised (Kay, 1937).
Areal limits (Conkin, 1991).

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: 15-Jan-2013