GIS Data
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Median-permeability contour maps of the J sandstone, Dakota Group, in the Denver Basin, Colorado, Nebraska, and Wyoming
The Lower Cretaceous J sandstone of the Dakota Group (MacKenzie, 1965) is present in the Denver basin in eastern Colorado, southeastern Wyoming, and southwestern Nebraska. This informally named unit deposited during a regression of the Cretaceous epi continental sea and is composed primarily of sandstone and shale of deItaic and near-shore marine origin. The J sandstone can be divided into an uppe
Metallogenic map of volcanogenic massive-sulfide occurrences in New Mexico
New Mexico volcanogenic massive-sulfide occurrences, which typically contain pyrite and pyrrhotite accompanied by variable amounts of base-metal sulfides and precious metals, are found within mainly subaqueous, compositionally bimodal metavolcanic successions of Early to Middle Proterozoic age that are exposed primarily in the north-central part of the state. Host rocks include both mafic and fels
Metamorphic map of the Iron River 1° x 2° quadrangle, Michigan and Wisconsin
No abstract available.
Mine and prospect map of the Manzano Wilderness, Torrance and Valencia counties, New Mexico
The U.S. Geological Survey and the U.S. Bureau of Mines conducted field investigations to evaluate the mineral resources of the Manzano Wilderness, Torrance and Valencia Counties, N. Mex., during 1980 and 1982. This map complements the mineral resource appraisal of the Manzano Wilderness (Maxwell and others, 1983). Field studies by the Bureau of Mines included a reconnaissance of mines, prospects,
Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona
This map is part of a folio of maps of the Ajo and Lukeville 1 ° x 2° quadrangles, Arizona, prepared under the Conterminous United States Mineral Assessment Program.
Mineral resource assessment map of the Big Gum Swamp Roadless Area, Columbia and Baker counties, Florida
The Big Gum Swamp Roadless Area (figs, 1 and 2) comprises 13,600 acres in the north-central part of the Osceola National Forest in Columbia and Baker Counties, about 12 airline miles northeast of Lake City, Fla. The area is bounded by Forest Service road 211 and Florida highway 250 on the south, Forest Service roads 233 and 232 on the west and north, and Forest Service road 235 on the east. The ar