Usage:
/Boulder Creek Volcanics of Amphitheater Group (AK)
[Preoccupied. Name previously applied to Boulder Creek Quartz Monzonite by Rose (1967), also in Mount Hayes quadrangle, AK.]
Geologic age:
Late Triassic
Type section, locality, area and/or origin of name:
Type locality: low mountains north of Boulder Creek and Sevenmile (Boulder) Lake, Eureka Creek area, Mount Hayes A-5 and Mount Hayes B-5 quadrangles (scale 1:63,360), AK (Stout, 1976).
AAPG geologic province:
Alaska Southern region
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 ([ ]).