Filters: Tags: Leflore County (X) > Types: Downloadable (X)

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Ground-based electromagnetic survey, Shellmound, Mississippi, October 2018 Shallow soil characteristics were mapped near Shellmound, Mississippi, using the DualEM 421 electromagnetic sensor in October 2018. Data were acquired by towing the DualEM sensor on a wheeled cart behind an all-terrain vehicle (ATV), with the sensor at a height of 0.432 meters (m) above the ground surface. Approximately 175 line-kilometers of data were acquired over an area of nearly four square-kilometers, with 25 m separation between survey lines. Data were manually edited for noise sources such as powerlines or other buried structures and averaged to regular output soundings every 5 m along survey lines. The processed data were inverted to recover models of electrical resistivity structure as a function of depth... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: GGGSC, GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geology, Geophysics, and Geochemistry Science Center, Leflore County, All tags... MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River Valley Alluvial aquifer, Shellmound, Tallahatchie River, USGS Science Data Catalog (SDC), dualEM, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, resistivity, water resources, Fewer tags Airborne electromagnetic, magnetic, and radiometric survey, Shellmound, Mississippi, March 2018 (ver. 2.0, March 2024) Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired in late February to early March 2018 along 2,364 line-kilometers in the Shellmound, Mississippi study area. Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. RESOLVE frequency-domain AEM instrument that is used to map subsurface geologic structure at depths up to 100 meters, depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions RS-500 spectrometer that detects... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: GGGSC, Geology, Geophysics, and Geochemistry Science Center, Geophysics, Greenwood, Hydrology, All tags... Leflore County, MRVA, Mississippi, Mississippi Alluvial Plain, Mississippi River Valley Alluvial aquifer, Shellmound, Sunflower County, Tallahatchie River, USGS Science Data Catalog (SDC), Water Resources, aeromagnetic surveying, aeroradiometric surveying, electromagnetic surveying, electromagnetics, engineering sciences, environment, geophysics, geoscientificInformation, geospatial datasets, groundwater, hydrogeology, magnetic anomaly maps, magnetic field, magnetics, radiometrics, resistivity, water resources, Fewer tags