Usage:
Napeequa Schist (WA*)
Geologic age:
pre-Late Triassic* (protolith age)
Late Cretaceous and early Tertiary* (metamorphic age)
Type section, locality, area and/or origin of name:
Type area: Napeequa River Valley, along the upper Napeequa River, at and in the vicinity of Lat. 48 deg. 02 min. 30 sec. N., Long. 120 deg. 53 min. 00 sec. W., Clark Mtn. 7.5-min quadrangle, Chelan Co., WA (Tabor and others, 2002).
AAPG geologic province:
Cascades 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 ([ ]).