- Usage in publication:
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- Thompson Canyon sandstone bed*
- Modifications:
-
- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
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- Paradox basin
Summary:
Named as a bed in middle part of Neslen member (new) of Price River formation of the Mesaverde group. Source of name and type locality not stated. Thompson Wash is in Ts21 and 22S, Rs19 and 20E, Grand Co, UT in the Paradox basin. Mapped from Saleratus Canyon to Cottonwood Canyon and east to Garfield Co, CO [extent into CO not discussed]. Consists of 10-15 ft of massive, faintly cross-bedded, straw-colored sandstone. Weathers to rounded surfaces. Overlain and underlain by unnamed parts of Neslen. Is 20 ft thick in a section measured in NW1/4 sec 32, T20S, R21E where it varies from buff-brown to buff-yellow. Thought to occupy same stratigraphic position as Rollins sandstone [member of Mesaverde formation] of CO. Of Late Cretaceous age. Geologic maps.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Thompson Canyon sandstone member*
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Paradox basin
Summary:
Recognized in the central Book Cliffs, UT in the Paradox basin. Raised in stratigraphic rank from Thompson Canyon sandstone bed to Thompson Canyon sandstone member of Neslen formation of Mesaverde group. Of late Campanian, Late Cretaceous age. Correlation chart.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Thompson Canyon Sandstone Bed*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Paradox basin
Summary:
Is a member of Neslen Formation of Late Cretaceous age. Identified only at Sego Canyon, Ts19 and 20S, R20E, Grand Co, UT in the Paradox basin. Is extensively burrowed and bioturbated. Contains low-angle trough cross-stratification and ripple laminations near top. Its geometry, lateral extent, and sedimentary structures indicate brackish-water deposition, probably a bay fill. Cross sections. Correlation chart. Measured sections. Of Late Cretaceous age.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).