- Usage in publication:
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- Miner Creek Formation*
- Modifications:
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- Named
- Dominant lithology:
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- Sandstone
- Siltstone
- AAPG geologic province:
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- Montana folded belt
Summary:
Named as a formation of Livingston Group (rank raised) for exposures along Miner Creek in E1/2 sec 19 and NW1/4 sec 20, T2S, R9E (also the type section), Park Co, MT, Montana folded belt province. Conformably overlies Cokedale Formation (new) of Livingston Group. Conformably underlies Billman Creek Formation (new) of Livingston Group. Is 1,350 ft thick at type. Divided into Sulphur Flats Sandstone Member (new) at base and alternating sandstone and siltstone beds in upper part. Siltstone forms 75% of the formation and is olive gray to green, has red specks and veinlets of heulandite, traces of analcite and laumontite. Sandstone forms about 20% of formation, is well bedded, fine grained, gray green, has andesitic fragments, plagioclase, augite, hornblende, and magnetite. The basal Sulphur Flats is massive, cross-bedded, and poorly sorted. Bentonite and tuff interbedded with basal sandstone. Ammonites of late Campanian age near top. Petrified wood, pollen, spores, and fragments of dinosaur bone near base in Sulphur Flats. Ranges from Campanian into early Maestrichtian. Assigned to the Late Cretaceous. Correlation chart.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
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- Miner Creek Formation*
- Modifications:
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- Overview
- AAPG geologic province:
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- Montana folded belt
- Central Montana uplift
Summary:
Detailed description of type measured section given. Is a unit of the Livingston Group that lies between the Cokedale Formation below and Billman Creek Formation, both of Livingston. Mapped in Montana folded belt province; extends into Central Montana uplift. Divided into Sulphur Flats Sandstone Member (base) and an unnamed upper part. Sulphur Flats is similar to Lennep Sandstone at Loweth, MT. Lists of fossil worm tubes, pelecypods, cephalopods, pollen and spores included. Sulphur Flats is nonmarine regressive unit. Correlates with lower part of Hell Creek Formation, the Lennep and Horsethief Sandstones. Of Late Cretaceous, Campanian and Maestrichtian age. Correlation chart. Geologic map.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
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- Miner Creek Formation*
- Modifications:
-
- Overview
- AAPG geologic province:
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- Montana folded belt
Summary:
Correlates with Sedan Formation, a newly named unit in Sedan area, Gallatin, Park, and Meagher Cos, MT in the Montana folded belt province. Also correlates with Maudlow Formation, a newly named unit in Maudlow area, Gallatin Co. Is of Late Cretaceous, early and late Campanian age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
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- Miner Creek Formation*
- Modifications:
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- Biostratigraphic dating
- AAPG geologic province:
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- Montana folded belt
Summary:
Palynomorphs collected from the middle part of the Miner Creek Formation of Livingston Group yielded an age of early Maastrichtian. These palynomorphs suggest the upper AQUILLAPOLLENITES QUADRILOBUS Interval Zone. Correlation chart. Is correlated with the upper part of the Livingston Formation and overlying Sphinx Conglomerate in the Madison Range. Is a name used in the Livingston area, MT in the Montana folded belt province where it overlies Cokedale Formation of Livingston and underlies Billman Creek Formation of Livingston.
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 ([ ]).