Usage:
Hillier Limestone (NY)
Hillier Limestone of Trenton Group (NY)
Hillier Member of Cobourg Formation of Trenton Group (NY?,Canada)
Geologic age:
Middle Ordovician
Type section, locality, area and/or origin of name: (See Canadian Lexicon)
Exposed for several mi along northern shore of Lake Ontario, west of Wellington, Hillier Twp., Prince Edward Co., Ontario, Canada. Named from the township (Kay, 1937).
AAPG geologic province:
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 ([ ]).