Ravena Member of Coeymans Limestone of Helderberg Group (NY*)
Ravena Limestone Member of Coeymans Formation of Helderberg Group (NY)
Early Devonian*
Type section: abandoned limestone quarry just south of hairpin turn in road ascending escarpment 0.5 mi northeast of village of Ravena, just west of Coeymans in Coxsackie quadrangle, east-central NY (Rickard, 1962).
Reference section: in southeastern most New York in three abandoned quarries on northwest side of Lime Kiln Road, on southeast slope of Trilobite Mountain, Port Jervis, NY (Epstein and others, 1967).
Appalachian basin*
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 ([ ]).