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Geologic map and coal stratigraphy of the Doty Mountain quadrangle, eastern Washakie basin, Carbon County, Wyoming Geologic map and coal stratigraphy of the Doty Mountain quadrangle, eastern Washakie basin, Carbon County, Wyoming
This report provides a geologic map of the Doty Mountain 7.5-minute quadrangle, located along the eastern flank of the Washakie Basin, Wyo. Geologic formations and individual coal beds were mapped at a scale of 1:24,000; surface stratigraphic sections were measured and described; and well logs were examined to determine coal correlations and thicknesses in the subsurface. Detailed...
Geologic Map of the Big Spring Quadrangle, Carter County, Missouri Geologic Map of the Big Spring Quadrangle, Carter County, Missouri
The bedrock exposed in the Big Spring quadrangle of Missouri comprises Late Cambrian and Early Ordovician aged dolomite, sandstone, and chert. The sedimentary rocks are nearly flat lying except where they are adjacent to faults. The carbonate rocks are karstified, and the area contains numerous sinkholes, springs, caves, and losing streams. This map is one of several being produced under...
Geologic map of the Lookout Ridge quadrangle, Alaska Geologic map of the Lookout Ridge quadrangle, Alaska
This map is a product of the USGS Digital Geologic Maps of Northern Alaska project, which captures in digital format quadrangles across the entire width of northern Alaska. Sources include geologic maps previously published in hardcopy format and recent updates and revisions based on field mapping by the Alaska Department of Natural Resources, Division of Geological and Geophysical...
Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 1: Principles of InSAR Interferometric synthetic aperture radar (InSAR) and its applications to study volcanoes, part 1: Principles of InSAR
Interferometric synthetic aperture radar is an ability to measure the surface deformation of remote sensing technology, in a huge area, its deformation measurement with sub-centimeter accuracy, and spatial resolution in the tens of meters or less. In this paper, the basic theory of InSAR technology is reviewed, its working principle is clarified, and the related problems of surface...
Geologic map of the Western Grove quadrangle, northwestern Arkansas Geologic map of the Western Grove quadrangle, northwestern Arkansas
This map summarizes the geology of the Western Grove 7.5-minute quadrangle in northern Arkansas that is located on the southern flank of the Ozark dome, a late Paleozoic regional uplift. The exposed bedrock of this map area comprises approximately 1,000 ft of Ordovician and Mississippian carbonate and clastic sedimentary rocks that have been mildly folded and broken by faults. A segment...
Geologic map of the San Francisco Bay region Geologic map of the San Francisco Bay region
The rocks and fossils of the San Francisco Bay region reveal that the geology there is the product of millions of years at the active western margin of North America. The result of this history is a complex mosaic of geologic materials and structures that form the landscape. A geologic map is one of the basic tools to understand the geology, geologic hazards, and geologic history of a...