Usage:
Trout Valley Formation (ME*)
Geologic age:
late Early to early Middle Devonian (Emsian to Eifelian)*
Type section, locality, area and/or origin of name:
Type section: exposures along Trout Brook, between the bridge over Trout Brook 2000 ft downstream from junction with South Branch Ponds, in T. 6, R. 9, and exposure of quartz andesite sill at sharp bend in Trout Brook, in T. 5, R. 10, Traveler Mountain quadrangle, north-central ME (Dorf and Rankin, 1962).
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 ([ ]).