Data

For all available weekly RCMAP-EAG data see the RCMAP Viewer - Next Generation Viewer or MRLC for download. Two weeks of sample data and metadata are included below. Exotic species can disrupt ecosystems since they often possess competitive advantages over native species. In the western United States, the spread of exotic annual grasses (EAG) like cheatgrass (Bromus tectorum) and...

This Data Release contains two compilations provide information on the date of the last known earthquake in the U.S. where available (conterminous U.S. and Alaska). There are two spatial datasets with different feature geometries — line features (“HistDOLE_v1”) and point features (“PaleoDOLE_v1”). The line features describe surface ruptures constrained by historical or near-historical...

This data release encompasses whole rock geochemical data determined on iron ore and host rock samples collected in California, Nevada, and Utah from March 2023 through June 2024. Whole rock geochemistry was conducted on 269 samples. Major element oxides were determined by borate fusion and wavelength dispersion X-ray fluorescence; 61 elements were determined by sodium peroxide fusion...

This report includes whole rock geochemical data from a newly collected suite of samples from igneous systems across Arizona. The data release includes samples collected in calendar year 2025 that support an ongoing, multi-year project dedicated to characterizing magmatic porphyry systems toward understanding possible basement influence on porphyry style mineralization. This preliminary...

This data release presents whole rock geochemical data and powder X-ray diffraction (XRD) mineralogic data from a suite of mafic and ultramafic geologic units in the United States. One-hundred-twelve samples were analyzed from core and outcrop settings at thirty sites, including from the contiguous United States, Alaska, and Hawaii. Sample localities include some of the large mafic and...

This data release includes whole rock (WR) geochemical data. Bureau Veritas Commodities Canada Ltd. Laboratories in Vancouver, British Columbia, Canada analyzed the samples. Meghan Toft and Greg Walsh collected the rock samples from outcrops in the 7.5-minute Paradox Lake quadrangle, New York. The whole rock geochemistry data constrain the composition of mapped rocks in the eastern...

This dataset consists of one table containing whole-rock geochemistry data for 748 rocks from southcentral Alaska. All materials in the present study were analyzed by ALS Global between 2014 and 2022 using a range of different techniques, so multiple unique entries for a given element relate to different analytical methods or preparations, as detailed in accompanying metadata, and...

The Laguna del Maule (LdM) volcanic field as mapped by Hildreth and others (2010) includes 36 postglacial rhyolite and rhyodacite coulees and domes that erupted from 24 separate vents that encircle the 54-km2 lake basin. Although recognizing that such effusive events commonly have accompanying explosive phases, pursuing downwind tephra studies into Argentina was not done then and the...

Spreadsheet containing whole-rock geochemical data.

This release of whole-rock geochemical data for northwestern Utah and adjacent states is for volcanic rocks sampled and analyzed from 1977 to present. The rocks range from Eocene to Quaternary in age and represent lava flows, tuffs, and subvolcanic intrusions. The data release includes new, previously unpublished data as well as results for USGS-processed samples that are publicly...

Geochemical data include major, minor and trace element results for alkaline silicate igneous rock samples from the Bear Lodge alkaline complex. Samples were collected during field work from natural exposures/outcrops and drill core. Samples were analyzed by the GeoAnalytical Lab at Washington State University and U.S. Geological Survey contract laboratories, AGAT Labs and SGS Labs...

The Aransas-Wood Buffalo population of whooping cranes migrates through the U.S. Great Plains twice annually, moving between wintering areas along coastal Texas and summering areas in and around Wood Buffalo National Park, Canada. These data support development of resource utilization functions that were used to predict wintering use of whooping cranes outside of their historic coastal...