- Usage in publication:
-
- Salmontrout limestone*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
-
- Limestone
- AAPG geologic province:
-
- Alaska East-Central region
Summary:
Named after Salmontrout River. Outcrops occur on both banks of Porcupine River immediately above Salmontrout River, east-central AK. Is massive light-gray to blue limestone weathering buff and considerably broken by joints. Is about 325 ft thick. Apparently unconformably overlies graptolite shales of Silurian age. Underlies brownish shales of Late Devonian age. Fossils (listed from collection site at Old Rampart House) are considered to represent Middle Devonian horizon.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Salmontrout Limestone*
- Modifications:
-
- Age modified
- Biostratigraphic dating
- AAPG geologic province:
-
- Alaska East-Central region
Summary:
Age is Early or Middle Devonian based on corals considered to be late Early Devonian (Emsian) or early Middle Devonian (Eifelian) age and associated shelly faunas, particularly tentaculitids, ostracodes, trilobites, and conodonts (Churkin and Brabb, 1968). [Identifications of fossils from report by Churkin and Brabb (1968) were revised.]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
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 ([ ]).