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Mancos Shale and Beartooth and Sarten Formations

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Mancos includes what was formerly referred to as Colorado Shale, which in turn may include equivalents of Tres Hermanos Formation.
State New Mexico
Name Mancos Shale and Beartooth and Sarten Formations
Geologic age Cenomanian and Albian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)no lith description on map - description from GEOLEX
Sedimentary > Clastic > Mudstone > Shale (Bed)no lith description on map - description from GEOLEX
Minor
Sedimentary > Carbonate > Limestone (Bed)no lith description on map - description from GEOLEX
References

New Mexico Bureau of Geology and Mineral Resources, 2003, Geologic Map of New Mexico, scale 1:500,000 (includes some new polygons, faults, and attributes not in NM001 - heads up digitizing by JHorton).

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/

https://ngmdb.usgs.gov/Geolex/search
NGMDB product
Counties Grant - Hidalgo - Luna