Becraft Formation of Helderberg Group (NY)
Becraft Limestone of Helderberg Group (NJ*,NY*,PA*,VA*)
Becraft Sandstone of Helderberg Group (VA*)
Becraft Member of Helderberg Limestone (MD,VA)
Early Devonian*
Named from Becraft's Mountain [Becraft Hills, Hudson South 7.5-min quadrangle], Columbia Co., eastern NY (Hall, 1893; Darton, 1894).
Appalachian basin*
New England province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).