Some mineralogical and geochemical aspects of Middle and Upper Pennsylvanian marine black shales in part of the midcontinent region

von Desborough, George A.
Veröffentlicht in Strategic and critical minerals in the midcontinent region, United States (1992)

Geological Investigations of the Vermillion Creek coal bed in the Eocene Niland Tongue of the Wasatch Formation, Sweetwater County, Wyoming

von Hatch, Joseph R.
Veröffentlicht 1987

Geology and mineral paragenesis of the Pea Ridge Iron Ore Mine, Washington County, Missouri - origin of the rare earth element and gold bearing Breccia pipes

Veröffentlicht 1992

Resource assessment of the Springfield, Herrin, Danville, and Baker Coals in the Illinois Basin : cooperative effort among the U.S. Geological Survey, Illinois State Geological S...

Veröffentlicht 2002