- Usage in publication:
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- Kalubik Formation
- Modifications:
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- Named
- Biostratigraphic dating
- Dominant lithology:
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- Mudstone
- AAPG geologic province:
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- Alaska Northern region
Summary:
Named after Kalubik Creek which flows into Harrison Bay. Type section designated as interval (5890 to 5670 ft) in Ugnu State No.1 well, Kuparuk oil field, northernmost edge of Alaskan North Slope. Is included as upper named formation (of 3) of Ugnuravik Group (new). Consists of brownish-gray to black, carbonaceous, silty mudstone with moderate fissility and containing nodular and disseminated pyrite. Is from 200 to 300 ft thick in Colville-Prudhoe basin. Overlies Kuparuk Formation (new) of Ugnuravik Group. Underlies HRZ unit of Ugnuravik Group. Age is Barremian to Aptian (Early Cretaceous) on basis of dinoflagellate and agglutinating foraminiferal assemblages.
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 ([ ]).