Usage:
Cabot Head Formation (MI,NY,OH*)
Cabot Head Shale Member of Cataract Formation (MI*)
Cabot Head Formation of Cataract Group (MI,OH)
Cabot Head Formation of Medina Group (PA)
Cabot Head Shale (OH)
Cabot Head Shale of Cataract Group (MI,OH)
Cabot Head Shale of Medina Group (PA)
Cabot Head Member of Cataract Formation (IN)
Cabot Head Member of Medina Formation (NY)
Geologic age:
early Silurian*
Type section, locality, area and/or origin of name:
Exposures at Cabots Head, Manitoulin Islands, Ontario, CAN (Grabau, 1913).
AAPG geologic province:
Michigan basin*
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 ([ ]).