Baker Terrane.

Massive and ribbon chert, phyllite, argillite, cherty limestone, and limestone deposited in relatively deep water, possibly in a forearc basin setting. (Mesozoic-Paleozoic Rocks of the Blue Mountains Island-Arc Complex).
State Idaho
Name Baker Terrane.
Geologic age Mesozoic and Paleozoic
Lithologic constituents
Major
Sedimentary > Chemical > Chert (Bed)Massive and ribbon chert; cherty limestone.
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Metamorphic > Metasedimentary > Metaclastic > Argillite
Minor
Sedimentary > Carbonate > Limestone (Bed)
References

Lewis, Reed S., Link, Paul K., Stanford, Loudon R., and Long, Sean P., Geologic Map of Idaho, 2012, Idaho Geological Survey, Geologic Map 9 (M-9); Scale 1:500,000.

NGMDB product
Counties Adams - Washington