- Usage in publication:
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- Laucomer Member
- Modifications:
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- Original reference
- Biostratigraphic dating
- Dominant lithology:
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- Sand
- Gravel
- AAPG geologic province:
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- Denver basin
Summary:
Pg. 275, 310-311, 337, 351-355, figs. 1-5, 14. Laucomer Member of Snake Creek Formation of Ogallala Group. Unconsolidated fluviatile deposit. Consists of quartz sand, gravel, fossil fragments, ash. Thickness up to 47 feet. Is middle member of Snake Creek Formation (restricted); formerly included in "Upper Snake Creek" beds by Matthew, 1923 (Amer. Mus. Nat. Hist. Nov., no. 53, p. 11-13). Unconformably overlies Murphy Member (new) of Snake Creek Formation. Fossils (vertebrates). Includes upper part of Snake Creek fauna. Age is middle Miocene (late Clarendonian NALMA).
Type section: near the Laucomer Ranch, on northeast side of Matthew's (Amer. Mus. Nat. Hist. Bull., v. 50, art. 2, p. 63, fig. 1, 1924) "Olcott Hill," in NE/4 SW/4 SE/4 sec. 3, T. 25 N., R. 55 W., Sioux Co., northwestern NE. Named from the David Laucomer Ranch. [Recognized locally in type area.]
Source: Publication; US geologic names lexicon (USGS Bull. 1564, p. 92).
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 ([ ]).