- Usage in publication:
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- Winterport Granite*
- Modifications:
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- Geochronologic dating
- AAPG geologic province:
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- New England province
Summary:
Pg. 19, geologic time scale (inside front cover). Winterport Granite of Stewart and Wones (1974). Sample from lineated, recrystallized, medium-grained quartz diorite, in Bucksport quadrangle, Waldo County, Maine, yielded U-Th-Pb ages from 405 +/-3 Ma to 362 +/-4 Ma. Concordia intercept age of 412 +/-14 Ma is approximate time of migmatization and granite intrusion in this area. Ages calculated using decay constants of Steiger and Jager, 1977 (Earth Planet. Sci. Letters, v. 36, p. 359-362).
Source: Publication.
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 ([ ]).