Lance Fm

Shale, sandstone, and minor coal beds; Fox Hills equivalent at base
State Colorado
Name Lance Fm
Geologic age Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Incidental
Sedimentary > Coal (Bed)
Comments Original map has this unit coded as Kl just like the Laramie fm; changed symbol to Kln to have 2 distinct units. Unit desc. slightly different.
References

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties Moffat - Routt