Found 14 datasets matching "geologic time periods".
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This data release includes a data-processing script, data products, and associated metadata for a study to model the hydrology of several hundred vernal pools (seasonal pools or ephemeral...
Search relevance: 44.61 | Views last month: 2 -
This 1:24,000-scale geologic map includes new geologic mapping as well as compilation and revision of previous geologic maps. Field investigations were conducted from 2009-2011, while also...
Search relevance: 42.50 | Views last month: 0 -
The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States (https://doi.org/10.5066/F7WH2N65) represents a seamless, spatial database of 48 State geologic maps that...
Search relevance: 37.93 | Views last month: 9 -
A time-lapse camera was used to document periodic reactivation of a complex landslide on a steep coastal bluff in Mukilteo, Washington. This landslide is one of four monitoring sites initiated by...
Search relevance: 37.86 | Views last month: 0 -
The U.S. Geological Survey (USGS) undertook a 5-year study beginning in 2016 to assess groundwater availability for the aquifers proximal to the Gulf of Mexico from the Texas-Mexico border to the...
Search relevance: 37.08 | Views last month: 0 -
A sequence of nine two-dimensional cross-sectional groundwater models using MODFLOW-2005 was created to study whether underpressures (subhydrostatic heads) in the Paleozoic units underlying the...
Search relevance: 35.08 | Views last month: 1 -
The geologic map database of the Great Smoky Mountains National Park region of Tennessee and North Carolina is a result from studies from 1993 to 2003 as part of a cooperative investigation by the...
Search relevance: 33.43 | Views last month: 0 -
In 2017 the U.S. Geological Survey, in cooperation with the Oklahoma Water Resources Board, published a calibrated numerical groundwater-flow model and associated model documentation report that...
Search relevance: 29.13 | Views last month: 0 -
Long-term monotonic trends in aquifer and regional groundwater levels in the United States 1912-2020
The U.S. Geological Survey (USGS) Water Resources Mission Area (WMA) is working to address a need to understand where the Nation is experiencing water shortages or surpluses relative to the demand...
Search relevance: 27.99 | Views last month: 0 -
The Little Plover River groundwater flow model simulates three-dimensional groundwater movement in and around Wisconsin’s Little Plover River basin under steady-state and transient conditions....
Search relevance: 27.48 | Views last month: 0 -
National-scale geologic, geophysical, and mineral resource raster and vector data covering the United States, Canada, and Australia are provided in this data release. The data were compiled as...
Search relevance: 27.08 | Views last month: 0 -
The maps in this data release show active landslide structures in three areas along the north flank of the Slumgullion landslide. After the entire active part of the landslide was mapped in 1992...
Search relevance: 21.48 | Views last month: 0 -
This database portrays the surface and shallow subsurface geology of the greater Charleston, S.C. region east of 80°30′ west and south of 33°15′ north. The region covers the entirety of Charleston...
Search relevance: 20.16 | Views last month: 3 -
The 1:100,000-scale geologic map of the South Boston 30' x 60' quadrangle, Virginia and North Carolina, provides geologic information for the Piedmont along the I-85 and U.S. Route 58 corridors...
Search relevance: 18.75 | Views last month: 2
