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Bug Formation

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Lacustrine white marl, claystone, sandstone, conglomerate, and tuff; generally radioactive.
State Wyoming
Name Bug Formation
Geologic age Pliocene-Pleistocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone
Unconsolidated > Marl (Lacustrine)
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Clastic > Conglomerate
Igneous > Volcanic > Felsic-volcanic (Pyroclastic-tuff)
References

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.

https://pubs.er.usgs.gov/publication/70046739
NGMDB product
Counties Natrona