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Reconnaissance map showing thickness of volcanic ash deposits in the greater Hilo area, Hawaii
Jane M. Buchanan-Banks
1983, Miscellaneous Field Studies Map 1499
This study was undertaken to determine the thickness and distribution of volcanic ash deposits in the greater Hilo area, Hawaii, as a step toward evaluating their susceptibility to failure during earthquake shaking. On several occasions their instability has resulted in serious damage. For example, the 1868 earthquake (m=7+), following a...
Aeromagnetic map and interpretation of geophysical data from the Condrey Mountain Roadless Area, Siskiyou County, California
R.C. Jachens, W.P. Elder
1983, Miscellaneous Field Studies Map 1540-B
The Condrey Mountain Roadless Area lies within the Klamath Mountains geologic province, a province composed of four eastward-dipping imbricate thrust slices or belts consisting predominantly of marine arc-related volcanic and sedimentary rocks, but also including significant amounts of ultramafic and other ophiolitic rocks (Irwin, 1981). From west to east the...
Maps showing the distribution and relationships of selected metals in heavy-mineral concentrates of the Hells Hole Further Planning Area (RARE II), Greenlee County, Arizona, and Grant County, New Mexico
J.R. Hassemer, K. C. Watts, C.L. Forn, E. L. Mosier
1983, Miscellaneous Field Studies Map 1344-D
The Wilderness Act (Public Law 99-577, Sept. 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...
Maps showing aeromagnetic data and interpretation for the Kalmiopsis Wilderness, southwestern Oregon
Richard J. Blakely, Norman J. Page, Floyd Gray, Lisa Senior, Holly F. Ryan
1983, Miscellaneous Field Studies Map 1240-D
The distinctive magnetic properties of the major rock types in the Kalmiopsis Wilderness of southwestern Oregon facilitate interpretation of aeromagenetic data. The region is composed of tectonic slices of magnetic ultramafic, gabboric, and other ophiolitic rocks faulted against  the realitively nonmagnetic Dothan Formation, the equivalent of the Franciscan Complex of...
Habitat Suitability Index Models: Alewife and blueback herring
Garland B. Pardue
1983, FWS/OBS 82/10.58
Alewives and blueback herring are anadromous clupeids found along the Atlantic coast in marine, estuarine, and riverine habitats, depending upon life stage. Both are important commercial species, used fresh or salted for human consumption, and used as crab bait, fish meal (particularly in animal food manufacturing), and fish oil. Alewife...
Reconnaissance geochemical survey of Al Jurdhawiyah and Wadi al Jarir quadrangles, sheets 25/42 D and 25/42 C, Kingdom of Saudia Arabia
Rashid M. Samater
1983, Open-File Report 83-299
A reconnaissance wadi-sediment geochemical survey was conducted in the Al Jurdhawiyah (sheet 28/42 D) and Wadi al Jarir (sheet 2G/42 C) quadrangles in order to identify anomalies potentially related to mineralized rock. Sieved bulk-sediment fractions and pan concentrates were created from the original samples collected from wadis in the two...
Mineral resource potential of the Piedra Wilderness Study Area, Archuleta and Hinsdale counties, Colorado
Alfred L. Bush, Steven M. Condon, Karen J. Franczyk, S. Don Brown
1983, Miscellaneous Field Studies Map 1630-A
The mineral resource potential of the Piedra Wilderness Study Area is low. No occurrences of metallic minerals, of valuable industrial rocks and minerals, or of useful concentrations of organic fuels are known in the study area. However, a noneconomic occurrence of gypsum in the Jurassic Wanakah Formation lies a few hundred feet west...