Interstate 90 Roadcut
Spokane
Spokane County
Washington
Apatite group mineral
Cristobalite
Feldspar group mineral
Pyrrhotite
Siderite ("sphaerosiderite")
Sources:
Ream, Lanny R.(1991)
Washington Mineral Locality Index
Rocks and Minerals, Vol. 66 No. 4, p. 286-292
