Found 25 datasets matching "δ18O".
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The present study investigates the environmental significance of the oxygen isotopic composition of several modern land snail species collected along two north-to-south transects in Alaska and...
Search relevance: 59.44 | Views last month: 0 -
Recent studies have shown the oxygen isotopic composition (δ18O) of modern terrestrial gastropod shells is determined largely by the δ18O of precipitation. This implies that fossil shells could be...
Search relevance: 53.31 | Views last month: 0 -
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...
Search relevance: 49.12 | Views last month: 0 -
In support of paleoclimatology investigations, samples of mammillary calcite, calcitic folia, and flowstone were collected by the U.S. Geological Survey in Devils Hole and Devils Hole Cave 2,...
Search relevance: 48.74 | Views last month: 0 -
Data set includes water Sr:Ca, Ba:Ca, and δ18O for the Mississippi River and tributaries, and otolith Sr:Ca, Ba:Ca, and δ18O data from bigheaded carp (Silver Carp and BIghead Carp) collected in...
Search relevance: 44.23 | Views last month: 0 -
Carbon and oxygen isotope data from annual tree rings in Ponderosa Pine collected in Oregon. The data was used in Ulrich, D. E. M., C. J. Still, J. R. Brooks, Y. Kim, and F. C. Meinzer. 2019....
Search relevance: 44.01 | Views last month: 0 -
Shallow groundwater samples were collected since 2006 for routine analysis by ODEQ from 16 domestic wells (installation dating from the 1970s) and 23 ODEQ groundwater monitoring wells...
Search relevance: 41.89 | Views last month: 0 -
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...
Search relevance: 40.82 | Views last month: 0 -
This data release includes a table of 87Sr/86Sr, 234U/238U, δ2H, and δ18O isotope data used to evaluate groundwater- and surface-water-sources contributing to water in perennial wetlands near the...
Search relevance: 40.66 | Views last month: 0 -
Modern observations of planktic foraminifera from sediment trap studies help to constrain the regional ecology of paleoceanographically valuable species. Results from a weekly-resolved sediment...
Search relevance: 40.32 | Views last month: 1 -
This data release contains tabular data (comma-separated-value files) of natural radiogenic isotopes of strontium, uranium, and thorium for samples of modern water, speleothems, associated with...
Search relevance: 39.23 | Views last month: 0 -
Real-time, high frequency (1-second sample interval) GPS location, water quality, and water isotope (δ2H, δ18O) data was collected in the Cache Slough Complex (CSC), located in the northern San...
Search relevance: 39.11 | Views last month: 0 -
The late Pleistocene was a climatically dynamic period, with abrupt shifts between cool-wet and warm-dry conditions. Increased effective precipitation supported large pluvial lakes and long-lived...
Search relevance: 39.10 | Views last month: 0 -
Data set includes water Sr:Ca, Ba:Ca, and δ18O for the Upper Mississippi River and tributaries and otolith Sr:Ca, Ba:Ca, and δ18O data from bigheaded carp collected in pools 19-21 of the Upper...
Search relevance: 38.62 | Views last month: 2 -
The isotopic values of fossil snail shells can be important archives of past climate. Here we present the first carbon (δ13C) and oxygen (δ18O) isotope values of radiocarbon-dated and...
Search relevance: 38.20 | Views last month: 0 -
A 2,000 year-long oceanographic history of a Canadian Beaufort Sea continental shelf site (60-meters water depth) near the Mackenzie River outlet is reconstructed from various proxies: ostracode...
Search relevance: 38.06 | Views last month: 0 -
Stable oxygen and carbon isotope composition (δ18O and δ13C) and magnesium-to-calcium (Mg/Ca) ratios were measured in the tests of planktic foraminiferal species, Globigerinoides ruber (white...
Search relevance: 34.79 | Views last month: 1 -
Water stable isotope data (both hydrogen and oxygen isotopes of H2O) from the Snoqualmie River Basin from 2017-2018. This data was paired with USGS gauge data so includes watershed...
Search relevance: 33.53 | Views last month: 1 -
Data on Produced Water Quality and Quantities from Hydraulically Fractured Williston Basin Oil Wells
This dataset contains compositional data on 17 produced water samples from hydraulically fractured unconventional oil wells completed in the Middle Bakken and Three Forks Formations. The oil...
Search relevance: 32.84 | Views last month: 2 -
The dataset includes water isotope values from samples spatially distributed across the Snake River basin collected between 2013-2015, and time series data collected from the Snake River at King...
Search relevance: 31.23 | Views last month: 0
