Cratonal Sequence - Continentally derived siltstone and clay

These continental deposits include variegated bentonitic claystone, siltstone, and clayey sandstone, ledge-forming sandstone, and red siltstone (Stewart and Carlson, 1978). The lower part of this unit is equivalent to the Upper Triassic Chinle Formation and the upper part corresponds to the Moenave and Kayenta Formations which are now considered Lower Jurassic (Stewart, 1980). It crops out in Elko, Lincoln, and Clark Counties.
State Nevada
Name Cratonal Sequence - Continentally derived siltstone and clay
Geologic age Lower Jurassic and Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)bentonitic claystone
Sedimentary > Clastic > Sandstone (Bed)clayey sandstone, ledge-forming sandstone
Sedimentary > Clastic > Siltstone (Bed)
References
NGMDB product
Counties Clark - Elko - Lincoln