Hornerstown Sand of Rancocas Group (NJ*,DE*,MD*)
Hornerstown Sand (NJ*)
Hornerstown Formation (NJ*,DE,MD)
Hornerstown Formation of Rancocas Group (NJ)
early Tertiary (early Paleocene; Danian); locally Late Cretaceous (Maastrichtian)*
Named from occurrence at Hornerstown, Monmouth Co., east-central NJ (Clark, 1907).
Atlantic Coast basin*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).