Usage:
Exeter Diorite (NH*)
Exeter Diorite in /Hillsboro plutonic series [informal] (NH)
[When referring to the Hillsboro plutonic series, please use informally. The practice of employing "Series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). The term "Series" is applied formally only to chronostratigraphic units.]
Geologic age:
Early Devonian*
Type section, locality, area and/or origin of name:
Exposures along Boston and Maine RR, between MA and ME, especially between towns of Exeter and Dover, Rockingham Co., southeastern NH (Hitchcock, 1870).
AAPG geologic province:
New England 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 ([ ]).