Data
Filter Total Items: 234
Deep learning classification of manganese and iron mines and prospects in the Lewisburg 30 x 60 minute quadrangle Deep learning classification of manganese and iron mines and prospects in the Lewisburg 30 x 60 minute quadrangle
Manganese is a designated critical mineral, being industrially utilized for producing steel and batteries, including in the production of electric vehicles (Rozelle and others, 2021). The central Appalachian Valley and Ridge hosts hundreds of manganese and iron oxide mines that served steel production until their abandonment in the mid-twentieth century (Lesure, 1957; Pegau, 1958). Many...
Microfocus X-ray computed tomography measurements of ostracode Paracyprideis pseudopunctillata from the Beaufort Sea Microfocus X-ray computed tomography measurements of ostracode Paracyprideis pseudopunctillata from the Beaufort Sea
This dataset includes measurements of shell properties (e.g. density, volume, and weight) of the ostracode species Paracyprideis pseudopunctillata (subphylum Crustacea), which inhabits the continental shelves of the Arctic Ocean. Using microfocus X-ray computed tomography (microXCT) scans, we generated detailed morphometric measurements of specimens collected from both surface and down...
Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina Geochemical data, thin section images, and modal mineralogy of selected bedrock samples in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina
This data release contains geochemical data, thin section images, and modal mineralogy from bedrock samples collected in the western half of the Emporia 30’ x 60’ quadrangle, Virginia and North Carolina. The geochemical data comprise whole-rock major oxide and trace element abundances in 246 samples. Pairs of thin section images in plane-polarized light and cross-polarized light are...
Electron Microprobe and 40Ar/39Ar data from the East Derby Shear Zone, Connecticut Electron Microprobe and 40Ar/39Ar data from the East Derby Shear Zone, Connecticut
This data release includes electron microprobe and 40Ar/39Ar measurements collected at the U.S. Geological Survey for samples from the East Derby Shear Zone (EDSZ) in Connecticut, USA. Rock samples were collected by Bryan Wathen, now at the University of Wisconsin. Muscovite, biotite, chlorite, plagioclase, and K-feldspar were analyzed by electron probe microanalysis at the U.S...
Database for the bedrock geologic map of the Bellows Falls 7.5- x 15-Minute Quadrangle, Windham and Windsor Counties, Vermont, and Sullivan and Cheshire Counties, New Hampshire Database for the bedrock geologic map of the Bellows Falls 7.5- x 15-Minute Quadrangle, Windham and Windsor Counties, Vermont, and Sullivan and Cheshire Counties, New Hampshire
The bedrock geology of the Bellows Falls 7.5 x 15 minute quadrangle, Vermont and New Hampshire, consists of polydeformed Ordovician to Devonian metasedimentary, metavolcanic, and metaplutonic rocks of the Connecticut Valley trough, Bronson Hill anticlinorium (or Bronson Hill terrane), and the Central Maine terrane. Previous work in this area includes a 1:62,500-scale published map and...
Electron microprobe and 40Ar/39Ar isotopic data from muscovite in the Raft River detachment zone, Utah, USA Electron microprobe and 40Ar/39Ar isotopic data from muscovite in the Raft River detachment zone, Utah, USA
This data release includes electron microprobe and 40Ar/39Ar data collected at the U.S. Geological Survey for samples from the Raft River metamorphic core complex in Utah, USA. Rock samples were collected by Raphael Gottardi, currently at Auburn University. Muscovite in thin sections from quartzites, micaceous quartzites, and quartz-kyanite rocks were analyzed by electron probe...
Suspended sediment statistical analyses results for nontidal and tidal stations of the Chesapeake Bay and watershed between 1984-2021 Suspended sediment statistical analyses results for nontidal and tidal stations of the Chesapeake Bay and watershed between 1984-2021
Results of statistical analyses of nontidal and tidal station measurements of suspended sediment concentrations in the Chesapeake Bay and watershed, collected from 1984-2021 by Chesapeake Bay Program and partners and the U.S. Geological Survey. Original measurements were retrieved from online data repositories.
Watershed Attributes for Chesapeake Stream Team Field Sites Watershed Attributes for Chesapeake Stream Team Field Sites
The Chesapeake Stream Team studied 123 streams from 2021 to 2024 to determine whether conservation practices in agricultural and urban settings have improved downstream nontidal stream health. To isolate effects of conservation practices, scientists must account for other attributes in the greater watershed that may affect measured metrics of stream health. This release includes over 450
Contaminants in bed sediment from surface waters collected in the Chesapeake Bay Watershed, 2021-24 (ver. 1.1, June 2026). Contaminants in bed sediment from surface waters collected in the Chesapeake Bay Watershed, 2021-24 (ver. 1.1, June 2026).
This data release provides contaminant data from bed sediment collected from small streams between 2021 and 2024 in the Chesapeake Bay Watershed. These data are part of a larger study designed to determine how conservation practices are affecting local stream ecosystem health, which stressors are negatively impacting streams, and which landscape characteristics are associated with better...
Macroinvertebrate communities in PA and MD Piedmont mixed agricultural streams, 2023 Macroinvertebrate communities in PA and MD Piedmont mixed agricultural streams, 2023
From 12 May – 18 May 2023, a Virginia Tech team of 2-3 sampled the macroinvertebrate community in 30 Upper Northern Piedmont streams (Maryland and Pennsylvania, USA) as part of a larger stream-health study including other teams who surveyed geomorphology, water quality, flow, temperature, fish community, and fish health at the same 30 streams. Macroinvertebrates were sampled using a 500...
Lithologic logs and photographs of cores from the Atlantic Coastal Plain Lithologic logs and photographs of cores from the Atlantic Coastal Plain
Coring of Atlantic Coastal Plain sediments has long been the basis of many projects funded by the National Cooperative Geologic Mapping Program. Over the past 50 years, more than 50 cores have been obtained, and accompanying geologic field notes (lithologic logs) and photographs were made by various geologists at the time of coring. These lithologic logs and photographs provide a record...
Database for the geologic map of the Frederick 30 x 60 quadrangle, Maryland, Virginia, and West Virginia Database for the geologic map of the Frederick 30 x 60 quadrangle, Maryland, Virginia, and West Virginia
The database for the geologic map of the Frederick 30 x 60 quadrangle covers the distinct geologic provinces and sections of the central Appalachian region that are defined by unique bedrock and resulting landforms. From west to east, the provinces include the Great Valley section of the Valley and Ridge province, the Blue Ridge province, and the Piedmont province; in the extreme...