Thickness of unconsolidated sediments for the USGS National Crustal Model

We present a numeric grid containing estimates of the thickness of unconsolidated sediments for the western United States. Values for these grids were combined and integrated from previous studies or derived directly from gravity analyses. The grids are provided with 1-km grid-node spacing in WGS84 latitude-longitude coordinates. Detailed information regarding the derivation of these estimates is provided by Shah, A.K, and Boyd, O.S., 2018, Depth to basement and thickness of unconsolidated sediments for the western United States - Initial estimates for layers of the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 2018-1115, https://doi.org/10.3133/ofr20181115.

Categories: Data; Tags: Arizona, CGGSC, California, Colorado, GHSC, All tags... Geologic Hazards Science Center, Geology, Geophysics, and Geochemistry Science Center, Idaho, Kansas, Montana, National Crustal Model, Nebraska (west), Nevada, New Mexico, North Dakota (west), Oklahoma (panhandle), Oregon, South Dakota (west), Texas (west), USGS Science Data Catalog (SDC), Washington, Western United States, Wyoming, basins, earthquake response, earthquakes, geoscientificInformation, gravity, hazards, regional study, sediments, three-dimensional mapping, unconsolidated sediments, Fewer tags

Depth to Mesozoic basement for the USGS National Crustal Model

We present a numeric grid containing estimates of the depth to the pre-Cenozoic basement for the western United States. Values for these grids were combined and integrated from previous studies or derived directly from gravity analyses. The grids are provided with 1-km grid-node spacing in WGS84 latitude-longitude coordinates. Detailed information regarding the derivation of these estimates is provided by Shah, A.K. and Boyd, O.S., 2018, Depth to basement and thickness of unconsolidated sediments for the western United States - Initial estimates for layers of the U.S. Geological Survey National Crustal Model: U.S. Geological Survey Open-File Report 2018-1115, https://doi.org/10.3133/ofr20181115.

Categories: Data; Tags: Arizona, CGGSC, California, Colorado, GHSC, All tags... Geologic Hazards Science Center, Geology, Geophysics, and Geochemistry Science Center, Idaho, Montana, National Crustal Model, Nevada, New Mexico, Oregon, USGS Science Data Catalog (SDC), Washington, Western United States, Wyoming, basement, basins, depth to basement, earthquake response, earthquakes, geoscientificInformation, gravity, hazards, regional study, three-dimensional mapping, Fewer tags

Components of the USGS National Crustal Model

Seismic hazard assessments depend on an accurate prediction of ground motion, which in turn depends on a base knowledge of three-dimensional variations in density, seismic velocity, and attenuation. The datasets here are components of a National Crustal Model that couples geologic characteristics and geophysical parameters using a physical theoretical foundation combined with measured data for calibration. The model is intended to be internally consistent and seamless on a national scale; care is also taken to maximize consistency with existing regional models. An initial version of the model components are defined for the western U.S. on a 1-km grid. While the current focus of this effort is on improving estimates...

Tags: Arizona, CGGSC, California, Colorado, Earthquake Hazards, All tags... GHSC, Geologic Hazards Science Center, Geology, Geophysics, and Geochemistry Science Center, Idaho, Kansas, Montana, National Crustal Model, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas, USGS Science Data Catalog (SDC), Washington, Western United States, Wyoming, basement, basins, depth to basement, earthquake response, earthquakes, geoscientificInformation, gravity, hazards, regional study, sediments, three-dimensional mapping, unconsolidated sediments, Fewer tags