• 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: 2020-08-12T00:00:00Z

This dataset includes data from isotopic analysis of eye and muscle tissue from fish collected in Clear Lake, Lake County, California during June and July 2017. This data release includes all...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Samples from outside the crater lake were analyzed for their sulfur isotopic composition. Samples of sulfate alteration and native sulfur from the Kīlauea summit, Halema’uma’u crater (HMM), and...

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• Organization: Department of the Interior
• Updated: 2022-01-31T00:00:00Z

Stable carbon and hydrogen isotopic data generated by off-line preparation and dual inlet mass spectrometric analysis used the determine the recommended values for the reference materials HCG-1,...

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• Organization: Department of the Interior
• Updated: 2023-08-04T00:00:00Z

Geochemical analysis of authigenic carbonates from the Cascadia Subduction Zone. Powdered carbonate samples for stable carbon (delta-C-13) and oxygen (delta-O-18) isotopes and carbonate phase were...

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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: 2025-09-19T00:00:00Z

This dataset contains U-Pb isotopic data and associated ages of zircons within the lithologic framework of igneous, metaigneous, and metasedimentary rocks collected from the Seldovia quadrangle in...

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• Organization: Department of the Interior
• Updated: 2024-08-01T00:00:00Z

This dataset includes thin section images, automated mineralogy mineral maps, whole-rock geochemical data, and whole-rock Nd-Sr-Pb isotopic analysis of samples collected from nine mafic-ultramafic...

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• Organization: Department of the Interior
• Updated: 2024-12-16T00:00:00Z

This data release contains three tables of U-Pb zircon isotopic data generated from analyses of 40 metaplutonic and metavolcanic rocks from the Yukon-Tanana Upland of western Yukon and...

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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: 2025-06-09T00:00:00Z

This dataset contains U-Pb isotopic data and ages, Hf isotope data, and trace element concentrations of zircon from igneous rocks collected from the Yukon-Tanana Upland, eastern Alaska. The sample...

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• Organization: Department of the Interior
• Updated: 2025-05-24T00:00:00Z

This dataset contains 40Ar/39Ar isotopic data and ages for rocks from the Yukon-Tanana upland of eastern Alaska and the northern Aleutian Range of south-central Alaska. The entire sample suite was...

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• Organization: Department of the Interior
• Updated: 2025-05-23T00:00:00Z

This data set contains U-Pb isotopic data and ages of zircon and titanite from igneous and metamorphic rocks collected from the western Alaska and northern Aleutian Range of south-central Alaska....

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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: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Aliquots of collected water samples were prepared for isotopic analysis at the USGS laboratories in Menlo Park, CA by precipitating dissolved sulfate as barium sulfate, using the methods of...

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• Organization: National Institute of Standards and Technology
• Updated: 2020-09-18 00:00:00

Data set from peer-reviewed publication: D. M. Bailey et al., Precision spectroscopy of nitrous oxide isotopocules with a cross-dispersed spectrometer and a mid-infrared frequency comb,...

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• Organization: Department of the Interior
• Updated: 2023-05-04T00:00:00Z

This dataset represents stable carbon and nitrogen isotopic information from tissue samples collected from diamondback terrapins, potential prey items, and vegetation from 6 salt marsh sites (4...

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• Organization: Department of the Interior
• Updated: 2021-10-25T00:00:00Z

Ice core from Greenland was melted, filtered, and homogenized. Its stable hydrogen (δ2H) and oxygen (δ18O) isotopic compositions were adjusted to approximately match those of USGS46 ice core water...

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• Organization: National Institute of Standards and Technology
• Updated: 2004-07-01 00:00:00

This database contains the rotational spectral lines observed and reported in the open literature for 91 hydrocarbon molecules through September 1987. The isotopic molecular species, assigned...

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

Examination of food webs and trophic niches provide insight into organisms’ functional ecology, yet few studies have examined the trophodynamics within submarine canyons, where the interaction of...

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