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Geophysical maps of the Winchester Roadless Area, Cochise County, Arizona

The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine their mineral resource potential. Results must be made available to the public and be submitted to the President and the Congress. This report presents the results of a geophysical survey of the Winchester R

Gravity and magnetic anomaly maps of the Tenmile West Roadless Area, Boise and Elmore Counties, Idaho

No abstract available. 

Gravity anomaly and terrain maps of the Cascade Range, California, Oregon, Washington, and British Columbia

No abstract available.

Gravity anomaly map of the United States; Part A: Conterminous United States

No abstract available.

Gravity anomaly maps of Ohio

No abstract available.

Historic trail maps of the Raton and Springer 30' x 60' quadrangles, New Mexico and Colorado

No abstract available.

Isopach map of interval between top of the Pictured Cliffs Sandstone and the Huerfanito Bentonite bed of the Lewis Shale, La Plata County, Colorado, and Rio Arriba and San Juan counties, New Mexico

This thickness map of a Late Cretaceous interval in the northwestern part of the San Juan Basin is part of a study of the relationship between ancient shore 1ines and coal-forming swamps during the filial regression of the Cretaceous epicontinental sea. The top of the thickness interval is the top of the Pictured Cliffs Sands tone. The base of the interval is a thin time marker, the Huerfanito Ben

Isostatic residual gravity, topographic, and first-vertical derivative gravity maps of the conterminous United States

No abstract available.

Log of an exploratory trench in the New Madrid seismic zone near Blytheville, Arkansas

During the winter of 1811-12, at least three major earthquakes having estimated magnitudes of MS 8.3-8.8 (Nuttli and Herrmann, 1984) struck the area near New Madrid, Mo. Since the 1811-12 series of earthquakes, 20 damaging earthquakes have occurred in the area (Nuttli, 1982), making the New Madrid seismic zone (fig. 1) the most seismically active area in the Eastern United States (Hadley and Devin

Logs of trenches across the Beatty Scarp, Nye County, Nevada

No abstract available.

Map showing areas of limonitic hydrothermal alteration in the Lake City Caldera area, western San Juan Mountains, Colorado

No abstract available. 

Map showing areas of visible land disturbances caused by two military training operations in the Mojave Desert, California

This map shows areas that retain visible land disturbances produced during two military armored-vehicle training operations in the Mojave Desert, California. The map documents the lasting visual effects these operations have on this arid region and provides a data base for monitoring changes in the extent of visual disturbances in the future. The first training operation was initiated in April 194