Usage:
Hellam Member of Chickies Quartzite (PA*)
Hellam Member of Chickies Formation (PA*)
Hellam Conglomerate Member of Chickies Formation (PA)
Geologic age:
Early Cambrian*
Type section, locality, area and/or origin of name:
Named from exposures in Hellam Hills, 3 mi west of Chickies Rock, York Co., southeastern PA (Stose and Jonas, 1922).
AAPG geologic province:
Piedmont-Blue Ridge 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 ([ ]).