Skip to main content
U.S. flag

An official website of the United States government

Publications

Results from our Program’s research and minerals information activities are published in USGS publications series as well as in outside journals.  To follow Minerals Information Periodicals, subscribe to the Mineral Periodicals RSS feed.

Filter Total Items: 2505

Preliminary location and age database for invertebrate fossils collected in the San Francisco Bay region, California Preliminary location and age database for invertebrate fossils collected in the San Francisco Bay region, California

Most geologic maps published for central California in the past century have been made without the benefit of microfossils. The age of Cretaceous and Tertiary rocks in the structurally complex sedimentary formations of the Coast Ranges is critical in determining stratigraphic succession and in determining whether the juxtapositon of similar appearing formations means that a fault is...
Authors
John M. Parker, William B. West, William T. Malmborg, Earl E. Brabb

Rationale and operational plan to upgrade the U.S. gravity database Rationale and operational plan to upgrade the U.S. gravity database

A concerted effort is underway to prepare a substantially upgraded digital gravity anomaly database for the United States and to make this data set and associated usage tools available on the internet. This joint effort, spearheaded by the geophysics groups at the National Imagery and Mapping Agency (NIMA), University of Texas at El Paso (UTEP), U.S. Geological Survey (USGS), and...
Authors
Thomas G. Hildenbrand, Allen Briesacher, Guy Flanagan, William J. Hinze, A. M. Hittelman, Gordon R. Keller, R.P. Kucks, Donald Plouff, Walter Roest, John Seeley, David A. Stith, Mike Webring

Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California Isostatic gravity map of the Monterey 30' x 60' quadrangle and adjacent areas, California

The digital dataset consists of one file (monterey_100k.iso) containing 2,385 gravity stations. The file, monterey_100k.iso, contains the principal facts of the gravity stations, with one point coded per line. The format of the data is described below. Each gravity station has a station name, location (latitude and longitude, NAD27 projection), elevation, and an observed gravity reading...
Authors
V.E. Langenheim, S. R. Stiles, R.C. Jachens

Rationale and operational plan for a U.S. high-altitude magnetic survey Rationale and operational plan for a U.S. high-altitude magnetic survey

On August 8, 2002, twenty-one scientists from the federal, private and academic sectors met at a workshop in Denver, Co., to discuss the feasibility of collecting magnetic anomaly data on a Canberra aircraft (Figure 1). The need for this 1-day workshop arose because of an exciting and cost-effective opportunity to collect invaluable magnetic anomaly data during a Canberra mission over...
Authors
Thomas G. Hildenbrand, Mario Acuna, Robert E. Bracken, Doug Hardwick, William J. Hinze, Gordon R. Keller, Jeff Phillips, Walter Roest

Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California

Clear Creek, one of the major tributaries of the upper Sacramento River, drains the eastern Trinity Mountains. Alluvial plain and terrace gravels of lower Clear Creek, at the northwest edge of the Sacramento Valley, contain placer gold that has been mined since the Gold Rush by various methods including dredging. In addition, from the 1950s to the 1980s aggregate-mining operations...
Authors
Roger P. Ashley, James J. Rytuba, Ronald Rogers, Boris B. Kotlyar, David Lawler

Gravity map and data of the eastern half of the Big Bear Lake, 100,000 scale quadrangle, California and analysis of the depths of several basins Gravity map and data of the eastern half of the Big Bear Lake, 100,000 scale quadrangle, California and analysis of the depths of several basins

Gravity surveys are useful tools for helping to understand the 3-dimensional geology of an area. Many gravity measurements were made in the 1960s and 1970s by various groups in order to produce gravity maps covering California at a scale of 1:250,000 for the California Division of Mines and Geology. (For this area see Biehler et. al. 1988.) More recent surveys have focused on specific...
Authors
Carter Roberts, Robert Jachens, Allan Katzenstein, Gregory Smith, Russell Johnson

Preliminary report on geophysical data in Yavapai County, Arizona Preliminary report on geophysical data in Yavapai County, Arizona

Recently acquired geophysical data provide information on the geologic framework and its effect of groundwater flow and on stream/aquifer interaction in Yavapai County, Arizona. High-resolution aeromagnetic data reflect diverse rock types at and below the topographic surface and have permitted a preliminary interpretation of faults and underlying rock types (in particular, volcanic) that...
Authors
V.E. Langenheim, J.P. Hoffmann, K.W. Blasch, Ed DeWitt, Laurie Wirt

Isostatic gravity map of Yukon Flats, east-central Alaska Isostatic gravity map of Yukon Flats, east-central Alaska

The gravity data used to make this map were collected between 1959 and 1984. The data were collected by automobile, aircraft, and watercraft. Most of the data were collected as part of a U.S. Geological Survey (USGS) regional gravity data collection project. Some of the data were collected as part of other USGS local projects. One data set was collected by the NGS (National Geodetic...
Authors
Robert L. Morin
Was this page helpful?