• Organization: U.S. Environmental Protection Agency
• Updated: 2017-09-25

Carbon stable isotopic ratios. This dataset is associated with the following publication: Washington, J., C. Rosal, E. Ulrich, and T. Jenkins. Use of carbon isotopic ratios in nontargeted...

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• Organization: Department of the Interior
• Updated: 2025-05-28T00:00:00Z

This dataset includes four tables with isotopic data and ages for selected igneous bedrock samples collected in 2001 through 2003 from the Western Alaska Range, southcentral Alaska: (1) the...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2002-07-01T00:00:00.000+00:00

This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI...

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• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

Instrument, standard, and sample data from application of in situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICPMS) dating of scheelite in thin section, and sample data from...

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• Organization: Department of the Interior
• Updated: 2020-09-29T00:00:00Z

Twenty-five ore and gangue mineral separates from the Miocene-age Goldfield and Tonopah epithermal Au-Ag deposits in southwestern Nevada were analyzed to determine the helium, neon, and argon (He,...

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• Organization: Department of the Interior
• Updated: 2022-08-24T00:00:00Z

Dataset provides inputs and model results of a stable isotope-based mixing model for estimating the relative contribution of seasonal recharge sources to the South Rim groundwater flow system,...

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• Organization: Department of the Interior
• Updated: 2024-06-25T00:00:00Z

This data release consists of new USGS-generated detrital zircon and sandstone petrography data from the Geosphere paper "Peri-Gondwanan-derived sediment in the Arkoma Basi from the north: The...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2014-10-27T00:00:00.000+00:00

This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI...

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• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

Tables of U- and Th-isotopic data used to calculate uranium-series age estimates and initial 234U/238U activity ratios as well as 87Sr/86Sr, δ13C, and δ18O for samples of phreatic speleothems from...

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• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

This dataset includes tables of He-isotopic data used to calculate surface exposure ages for samples of basalt, and U- and Th-isotopic data used to calculate uranium-series age estimates (230Th/U...

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• Organization: Department of the Interior
• Updated: 2025-05-29T00:00:00Z

This dataset contains uranium–lead (U-Pb) isotopic data and ages, hafnium (Hf) isotope data, and trace element concentrations of zircon from igneous rocks collected from the Darby Mountains area...

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

This data release contains chemical and isotopic data used in an investigation of nitrate sources and transport in the Upper Illinois River basin. Samples (total = 445) include river water from...

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• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

This dataset includes tables with physical information and isotopic data that are used to calculate uranium-series ages (230Th/U method) and initial 234U/238U activity ratios on a suite of...

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• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

This dataset includes tables of U- and Th-isotopic data used to calculate uranium-series age estimates (230Th/U method) and initial 234U/238U activity ratios for samples of pedogenic carbonate...

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• Organization: Department of the Interior
• Updated: 2022-06-08T00:00:00Z

The U.S. Geological Survey collected groundwater samples from 17 wells in the Indio subbasin (CA basin designation 7-21.01) of the Coachella Valley and surface water samples from two sites...

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• Organization: Department of the Interior
• Updated: 2020-08-30T00:00:00Z

This study was initiated to provide baseline data and to determine the utility of stable isotope analysis to evaluate the foraging strategies of an opportunistic reptile predator. Stable isotope...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2011-01-01T00:00:00.000+00:00

d15N and d13C isotopic ratios from multiple groundfish and groundfish prey samples collected on groundfish surveys and by fishery observers onboard commercial fishing vessels in the eastern Bering...

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• Organization: Department of the Interior
• Updated: 2022-12-14T00:00:00Z

Burmese pythons are an invasive species in the Greater Everglades Ecosystem. Burmese pythons captured in the ecosystem are euthanized, and in an effort to learn about this invasive species, all...

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• Organization: Department of the Interior
• Updated: 2025-05-30T00:00:00Z

This dataset contains U-Pb isotopic data and ages, Hf isotope data, and trace element concentrations of zircon from igneous rocks collected from the western Alaska Range of south-central Alaska....

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

This dataset includes the field measurements and laboratory analyses of surface water, seston, and sediment collected from Lake Powell, within Glen Canyon National Recreation area (GLCA), during...

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