Usage:
Ledger Dolomite (PA*,MD*,VA*)
Ledger Formation (PA)
Subunits:
lower dolomite member, Willis Run Member, upper dolomite member (PA)
Geologic age:
Cambrian, Early
Cambrian, Middle*
Type section, locality, area and/or origin of name:
Named from Ledger, Lancaster Co., 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 ([ ]).