Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted. For more information, please see www.doi.gov/shutdown
National Cooperative Geologic Mapping Program
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The National Cooperative Geologic Mapping Program (NCGMP) is the primary source of funds for the production of geologic maps in the United States and provides accurate geologic maps and three-dimensional framework models that help to sustain and improve the quality of life and economic vitality of the Nation and to mitigate natural hazards.Read More
The Central Virginia seismic zone (CVSZ) comprises an area of ~13,000 km2 in the central Virginia Piedmont; seismicity in this zone is relatively frequent, but generally mild in magnitude. The August 2011 event was the largest temblor recorded in the CVSZ since the development of modern seismic monitoring and highlighted how little we actually know about the CVSZ, including: 1) the...
Created in response to the National Geologic Mapping Act (NGMA), FEDMAP develops new ways to understand basic earth science processes and produces high-quality, multipurpose digital geologic maps, regional analyses, and multidimensional geologic models. Geologic maps are the primary data base for virtually all earth-science applications and issues including mitigation of natural hazards;...
The primary objective of the STATEMAP component of the NCGMP is to establish the geologic framework of areas that are vital to the welfare of individual States.
American scientist-explorers have been making geologic maps since before the Bureau's inception in 1879. Learn about some of the premier USGS geologists who, through their work, have done so much to shape our understanding of the geologic framework of the Nation.
Since geologic maps were first constructed in the late 18th and early 19th centuries, they have played a fundamental role in understanding the history of the Earth and providing the information needed to solve practical land-use problems.
The National Geologic Map Database (NGMDB) is a distributed archive of geoscience information for the Nation. It was mandated by the Geologic Mapping Act of 1992 and is cooperatively built and maintained by the USGS and State Geological Surveys. We welcome you to explore the archive, view the maps, and help us to...
To create, manage, and publish natural science data and information effectively, both data producers and users agree that it is essential to adhere to widely-accepted standards.
The Florida Coastal Mapping Program (FCMaP) is an initiative between Federal and Florida State agencies and institutions to coordinate and facilitate the collection and accessibility of Florida coastal seafloor data in order to fill priority areas and gaps.
The primary objective of the STATEMAP component of the NCGMP is to establish the geologic framework of areas that are vital to the welfare of individual States. Each State Geologist determines the State's mapping priorities in consultation with a State Mapping Advisory Committee.
Created in response to the National Geologic Mapping Act (NGMA), FEDMAP develops new ways to understand basic earth science processes and produces high-quality, multipurpose digital geologic maps, regional analyses, and multidimensional geologic models.
Data release of geospatial map database and structural measurements for: Geologic map of the Osage SW 7.5' quadrangle, Newton, Madison, and Carroll counties, Arkansas
This dataset accompanies publication "Geologic map of the Osage SW 7.5' quadrangle, Newton, Madison, and Carroll counties, Arkansas". Data presented here include the digital geologic database and structural measurements including joints, deformation bands, and small faults collected during field investigation.
The datasets consist of basic well information and of digitized sonic velocity data from commercially run well logs.
Data release of geospatial map database, argon geochronology and geochemistry data for: Geologic map of the San Antonio Mountain area, northern New Mexico and southern Colorado
This dataset accompanies publication "Geologic map of the San Antonio Mountain area, northern New Mexico and southern Colorado". Data presented here include the digital geologic database, 40Ar/39Ar geochronology and major and trace element chemistry from lava flows and an ignimbrite. The geologic database includes spatial feature classes and non-spatial tables that collectively contain the...
The U.S. National Geologic Map Database (NGMDB) serves as the authoritative, comprehensive resource for information about paper and digital geoscience maps and reports on the Nation's geology and stratigraphy, by all publishers.
Data for a Comprehensive Survey of Fault Zones, Breccias, and Fractures in and Flanking the Eastern Española Basin, Rio Grande Rift, New Mexico
This release provides the data for a comprehensive survey of geologic structures in the eastern Española Basin of the Rio Grande rift, New Mexico. The release includes data and analyses from 53 individual fault zones and 22 other brittle structures, such as breccia zones, joints, and veins, investigated at a total of just over 100 sites. Structures were examined and compared from...
Physical properties of geologic units are important for geophysical interpretation because they provide the tie between lithology and geophysical fields. For gravity data, the applicable physical property is bulk density, which is the overall mass per unit volume of rocks, sediments, and their pore spaces. Bulk dry density is the mass per unit volume measured when the sample is dry. Saturated...
Gravity data were collected from 2006 through 2015 to assist in mapping subsurface geology in the southern San Luis Basin, northern New Mexico. This data release provides principal facts for 566 new gravity stations that were acquired to fill in gaps in the existing public gravity data coverage.
Quaternary sediment thickness and bedrock topography of the glaciated United States east of the Rocky Mountains
Beginning roughly 2.6 million years ago, global climate entered a cooling phase known as the Pleistocene Epoch. As snow in northern latitudes compacted into ice several kilometers thick, it flowed as glaciers southward across the North American continent. These glaciers extended across the northern United States, dramatically altering the...Soller, David R.; Garrity, Christopher P.
Alaska geologic road guides
No abstract available.Bundtzen, Thomas K.; Nokleberg, Warren J.; Price, Raymond A.; Scholl, David W.; Stone, David B.; Nokleberg, Warren J.; Bundtzen, Thomas K.; Stone, David B.; Mull, Charles G.
Automatic delineation of seacliff limits using lidar-derived high-resolution DEMs in southern California
Seacliff erosion is a serious hazard with implications for coastal management and is often estimated using successive hand-digitized cliff tops or bases (toe) to assess cliff retreat. Even if efforts are made to standardize manual digitizing and eliminate subjectivity, the delineation of cliffs is time-consuming and depends on the analyst's...Palaseanu-Lovejoy, Monica; Danielson, Jeffrey J.; Thatcher, Cindy A.; Foxgrover, Amy C.; Barnard, Patrick L.; Brock, John C.; Young, Adam
Digital Mapping Techniques '10-Workshop Proceedings, Sacramento, California, May 16-19, 2010
The Digital Mapping Techniques '10 (DMT'10) workshop was attended by 110 technical experts from 40 agencies, universities, and private companies, including representatives from 19 State geological surveys (see Appendix A). This workshop, hosted by the California Geological Survey, May 16-19, 2010, in Sacramento, California, was similar in nature...Soller, David R.; Soller, David R.
Digital Mapping Techniques '09-Workshop Proceedings, Morgantown, West Virginia, May 10-13, 2009
The Digital Mapping Techniques '09 (DMT'09) workshop was attended by 90 technical experts from 42 agencies, universities, and private companies, including representatives from 24 State geological surveys. This workshop, the thirteenth in the annual series, was hosted by the West Virginia Geological and Economic Survey, May 10-13, 2009, on the West...Soller, David R.
USGS EDMAP Program-Training the Next Generation of Geologic Mappers
EDMAP is an interactive and meaningful program for university students to gain experience and knowledge in geologic mapping while contributing to national efforts to map the geology of the United States. It is a matching-funds grant program with universities and is one of the three components of the congressionally mandated U.S. Geological Survey...
A method for vreating a three dimensional model from published geologic maps and cross sections
This brief report presents a relatively inexpensive and rapid method for creating a 3D model of geology from published quadrangle-scale maps and cross sections using Google Earth and Google SketchUp software. An example from the Green Mountains of Vermont, USA, is used to illustrate the step by step methods used to create such a model. A second...Walsh, Gregory J.
An Examination of Selected Historical Rainfall-Induced Debris-Flow Events within the Central and Southern Appalachian Mountains of the Eastern United States
Generally, every several years, heavy amounts of rainfall trigger a large number of debris flows within the central and southern Appalachian Mountains of the Eastern United States. These types of landslides damage buildings, disrupt infrastructure, and occasionally injure and kill people. One of the first large debris flows was described in...Wieczorek, Gerald F.; Eaton, L. Scott; Morgan, Benjamin A.; Wooten, R.M.; Morrissey, M.
Crater Lake revealed
Around 500,000 people each year visit Crater Lake National Park in the Cascade Range of southern Oregon. Volcanic peaks, evergreen forests, and Crater Lake’s incredibly blue water are the park’s main attractions. Crater Lake partially fills the caldera that formed approximately 7,700 years ago by the eruption and subsequent collapse of a 12,000-...Ramsey, David W.; Dartnell, Peter; Bacon, Charles R.; Robinson, Joel E.; Gardner, James V.
Geologic map and database of the Salem East and Turner 7.5-minute quadrangles, Marion County, Oregon: a digital database
The Salem East and Turner 7.5-minute quadrangles are situated in the center of the Willamette Valley near the western margin of the Columbia River Basalt Group (CRBG) distribution. The terrain within the area is of low to moderate relief, ranging from about 150 to almost 1,100-ft elevation. Mill Creek flows northward from the Stayton basin (Turner...Tolan, Terry L.; Beeson, Marvin H.; Digital Database by DuRoss, Christopher B.
Greg Walsh using digital geologic mapping technics to measure fault in Champlaign Valley, NY
A tutorial by USGS scientist and topoView developer Chris Garrity demonstrating how to use topoView version 2.1. TopoView let's you access and download maps free of charge from the USGS's Historical Topographic Map Collection, published between 1884 and 2006.
An Introduction to TopoView (version 1.0)
Comparison of changes throughout the history of the National Geologic Mapping Act and reauthorizations.
2007-2011 Program Plan: National Cooperative Geologic Mapping Program
In celebration of Earth Science Week and Geologic Map Day, the USGS National Cooperative Geologic Mapping Program is highlighting several exciting ongoing and upcoming geoscience-related activities:
Calling all geoscience faculty conducting research or teaching geologic mapping. The USGS EDMAP Program is accepting funding proposals focusing on geologic mapping to support upper-level undergraduate and graduate students at their colleges or universities.
Program coordinators are now accepting applications for the 2018 Appalachian Geoscience GeoCamp.
Congratulations to the winners of the 5th Annual Best Student Geologic Map Competition, held at the Geological Society of America's recent Annual Meeting in Seattle, WA.
To celebrate Earth Science Week and Geologic Map Day, the USGS, in collaboration with the American Geosciences Institute, is pleased to announce a “Geologic Open House” on Thursday, October 12, 2017 at Great Falls Park, near McLean, Va.
Calling all Earth Science professors conducting research or teaching geologic mapping. The USGS EDMAP Program is accepting funding proposals focusing on geologic mapping to support upper-level undergraduate and graduate students at their colleges or universities.
As part of the USGS National Cooperative Geologic Mapping Program, EDMAP is supporting upcoming geologic mappers by providing invalubable experience and matching-funds grants.
Earlier this month, the USGS launched “TopoView 2.1”, an enhancement to the current popular TopoView mapping service that lets users discover, interact, and download historical USGS topographic maps scans.