Title: Niobium (columbium) and titanium at Magnet Cove and Potash Sulphur Springs, Arkansas
Subjects: Drill cores, Economic Geology, Geology, Economic, Igneous Rocks, Niobium ores, Rocks, Igneous, Rocks, Sedimentary, Sedimentary Rocks, Titanium ores
Places: Arkansas, Garland County, Hot Spring County