Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Argon data for samples from Sheep Creek and other mineral systems in central and western Montana, USA Argon data for samples from Sheep Creek and other mineral systems in central and western Montana, USA
This dataset includes 40Ar/39Ar data for 14 samples from the Sheep Creek carbonatite occurrence and other mineral systems in central and western Montana, USA. Samples were acquired from this area by Christopher Gammons and his students (Montana Technological University). Mineral separates of biotite and sericite from the samples were analyzed in the Denver Argon Geochronology Laboratory...
Data on Lepidium draba seed set and genetic diversity in northern Colorado Data on Lepidium draba seed set and genetic diversity in northern Colorado
Data were collected on the seed production and genetic diversity of Lepidium draba, an invasive plant. Site characteristics were also measured for 26 sites throughout northern Colorado. In addition, a pollen supplementation experiment was conducted at six of those sites, in which L. draba plants were pollinated with within-population pollen, among-population pollen, or were not...
Raster layers of optimal protection and restoration sites, ecological status, greater sage-grouse lek abundance, and connectivity to prioritize multi-species, sagebrush ecosystem management across Wyoming, USA Raster layers of optimal protection and restoration sites, ecological status, greater sage-grouse lek abundance, and connectivity to prioritize multi-species, sagebrush ecosystem management across Wyoming, USA
This data release includes a set of 25 rasters representing solutions (and associated input data) to two sagebrush conservation problems that identify optimal sites across the state of Wyoming for protection or restoration action (based on management-relevant inputs and constraints). The arid sagebrush-steppe ecosystems of western North America are undergoing substantial loss and...
Microfossil samples from the San Andreas Fault Zone and surrounding areas in and near Pinnacles National Park, central California Microfossil samples from the San Andreas Fault Zone and surrounding areas in and near Pinnacles National Park, central California
This data release includes microfossil data, including flora and fauna lists, as well as microfossils zonation and numeric age range, for samples collected in and around the San Andreas Fault Zone in and near Pinnacles National Park between 2010-2012.
Ground Magnetic Observations of the Mammoth Magnetic Anomaly, Pinal County, Arizona, May 2025 Ground Magnetic Observations of the Mammoth Magnetic Anomaly, Pinal County, Arizona, May 2025
This data release provides ground magnetic data collected in May 2025 at the Mammoth Magnetic Anomaly (MMA) site in Pinal County, Arizona. These data were collected to validate and characterize a large aeromagnetic anomaly observed in an airborne survey of southeastern Arizona (Scheirer et al., 2025). The geophysical fieldwork was funded by the Earth Mapping Resources Initiative. Ground...
Argon Geochronology Data from Pleistocene Volcanic Deposits Along the Pit River, California Argon Geochronology Data from Pleistocene Volcanic Deposits Along the Pit River, California
Argon geochronology results date eruptions of mapped volcanic deposits north and south of the PIt River in the California Cascades. This data release includes both raw data and summary data. Summary data are the results USGS geochronologist(s) recommend be cited in geologic history publications.