Data

This dataset contains U-Pb isotopic data and associated ages of zircons from selected igneous rocks collected from the region surrounding and including the uplands of the United States Territory of Puerto Rico. The samples were collected as part of geological mapping and research conducted during 2018 and funded by the Mineral Resources Program of the U.S. Geological Survey. Zircon grains were sep

This data set contains various reported age determinations from various rock types collected from the larger region surrounding and including the islands of the Greater Antilles and United States Territory of Puerto Rico. Although a select few of the samples were collected as part of geological mapping and research conducted and funded by the Mineral Resources Program of the U.S. Geological Survey

Acoustic recorders can detect the presence of birds and these detections may be used for the purpose of population abundance or estimation. This monitoring project compared the abundance of tundra-breeding birds detected through both acoustic monitoring and observational surveys. The data package is comprised of four tables: (1) habitat type, including vegetation height at sites where acoustic rec

This dataset contains morphological measures of 21 Pacific walruses in human care in the United States, Belgium, and Germany measured directly and via an aerially mounted camera in 2022 and 2023. Six individuals were measured twice: once at their typical annual lowest body mass and once at their typical annual maximum body mass. The remaining 15 individuals were measured on one occasion. Straight-

This dataset summarizes selected basin and streamflow special conditions for USGS streamgages in Alaska that are commonly used for site and period of record selection for regional analyses, through water year 2022. The data consist of a table providing information about the type of streamflow available for the site, site special conditions related to the timing of data collection, basin special co

This dataset provides estimated Remote Sensing Streamflow (RSQ) data at selected river reaches in Alaska. Reach-specific relations between satellite-derived water-surface elevation data and dynamic surface water extent data were used with a modified form of the Manning's streamflow equation to estimate streamflows. The streamflow estimates were used to create rating tables that define the relation

This data release contains measurements from continuous monitors of stream temperature, groundwater temperature, and well water levels, and discrete measurements of discharge and stream shading.

This data release corresponds to visual vegetation measurements in snow goose grazing areas of the Colville River Delta. Visual vegetation measurements data include functional group percent cover and evidence of goose activity including grazed stems, snow goose grubbing holes, and shoot pulling. These data were collected at a set of four 100m transects located in areas of representative vegetation

These data are in two tables: 1) table relating to emperor goose nest visit, nest fate, and nest dispersal distances on the Yukon-Kuskokwim Delta in Alaska, 2000-2017; 2) table with means and standard deviations for posterior distributions of predicted nest-age and year specific daily nest survival probabilities for emperor geese derived from estimates reported by Thompson et al. (2023) for the Ma

This data release consists of one table of multi-year observations of Rock Sandpipers (Calidris ptilocnemis) and aerial photographs of Rock Sandpiper flocks at sites in upper Cook Inlet, Alaska, 1997-2014.

This dataset represents a digitized version of the Rawlinson 1993 surficial geologic map of the Flaxman Island and Beechy Point quadrangles, and portions of the Mount Michelson and Harrison Bay quadrangles at 1:63,360 scale. In this newly digitized version of the map, the original maps were scanned, georeferenced, and projected into GIS. Approximately 100-200 typographic and labelling errors from

This data release contains two vector polygon shapefile datasets that delineate footprints of land surface disturbance and waste that may represent potential above-ground resources resulting from past mining in Alaska. These footprints were mapped on 2023 World Imagery at the location of currently inactive Alaska Resource Data File sites of past mining production.