- Usage in publication:
-
- North Hogback tongue*
- Modifications:
-
- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
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- San Juan basin
Summary:
Named as the upper tongue of the Point Lookout sandstone, basal formation of Mesaverde group. Source of name and type locality not stated. Is a northeasterly thickening wedge of Point Lookout below the Menefee formation. The top of the Point Lookout is about 65 ft higher stratigraphically to the north. Only known occurrence is in secs 10 and 11, T30N, R16W. Is about 50 ft thick in section near Hogback monocline [base not exposed?] shown on cross section. Composed of gray to white, fine- to medium-grained, even-textured, massive sandstone of littoral marine origin. Geologic map. 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 ([ ]).