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, Nevada, between 1983 and 1996. These samples came from about 60 m below to 9 m above the modern water table in these caverns. To determine δ18O and δ13C time series spanning the interval 567.7–4.5 ka, more than a thousand samples were milled and analyzed for their δ18O and δ13C values. To determine time-series ages, more than a hundred samples were analyzed using uranium-series dating. Many of these measurement results have not been published. Herein, we provide previously unpublished δ13C and δ18O values, and we provide unpublished background data for selected uranium-series ages.

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 study type is Cave. The data include parameters of speleothems with a geographic location of Nevada, United States Of America. The time period coverage is from 204226 to 4896 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

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 study type is Cave. The data include parameters of speleothems with a geographic location of Nevada, United States Of America. The time period coverage is from 16400 to 3836 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

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 study type is Cave. The data include parameters of speleothems with a geographic location of California, United States Of America. The time period coverage is from 66965 to 55222 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

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 study type is Cave. The data include parameters of speleothems with a geographic location of California, United States Of America. The time period coverage is from 16340 to 8770 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

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 study type is Cave. The data include parameters of speleothems with a geographic location of Idaho, United States Of America. The time period coverage is from 11122 to 7 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

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 study type is Cave. The data include parameters of speleothems with a geographic location of Belize, Central America. The time period coverage is from 7159 to 4630 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.

Elemental concentrations and stable oxygen and carbon isotope ratios are reported for five mammillary calcite specimens collected from the groundwater-filled fissures Devils Hole and Devils Hole II in the southern Amargosa Desert, south-western Nevada. Previous studies of these specimens yielded oxygen and carbon isotope chronologies of paleoclimatic and paleo hydrologic conditions over an approximately 500,000-year time period as defined by uranium series dates (Winograd and others, 1992, 2006; Landwehr and others, 1997, 2011). The elemental concentration measurements reveal additional chronologies in the mammillary calcite. The specimens were sampled by milling contiguous 0.050-inch-thick layers (1.27 millimeters) oriented approximately parallel to the free, wetted growth faces of the specimens. For three of the five specimens (cores DH-10 and DH-11, hand specimen DH-7), the oxygen and carbon isotope measurements reproduce measurements of the same milled samples made by Landwehr and others (1997) and Coplen and others (2021). For the remaining specimens (hand specimens DHC2-3 and DHC2-8), the oxygen and carbon isotope measurements reproduce isotopic records published by Coplen and others (2021) but at a coarser resolution because Coplen and others (2021) analyzed milled layers of 0.010-inch thickness (0.25 millimeters). The elemental chronologies can be dated by referring to prior studies. For DH-11, uranium series dates and interpolated ages are given by Landwehr and others (1997). For DH-7 and DH-10, ages obtained by matching oxygen and carbon isotope chronologies to the dated chronologies of DH-11 are given by Coplen and others (2021). For DHC2-3 and DHC2-8, ages can be obtained by matching the oxygen and carbon isotope chronologies presented here to the higher-resolution dated chronologies provided by Coplen and others (2021). However, age assignments should be made with caution (see, for example, Moseley and others, 2016). Devils Hole and Devils Hole II are extensional tectonic fissures that open to the land surface adjacent to the major Ash Meadows ground-water discharge area. Devils Hole II is approximately 200 meters north of Devils Hole. The fissures intersect the regional groundwater table at about 17 meters and 36 meters below land surface at Devils Hole and Devils Hole II, respectively. These localities have long been important in paleoclimate research because mammillary calcite phreatically precipitated on the fissure walls has yielded a dated continuous paleotemperature proxy record that spans several glacial cycles (Winograd and others, 1988, 1992, 2006; Ludwig and others, 1992; Coplen and others, 1994; Riggs and others, 1994; Szabo and others, 1994; Plummer and others, 2000; Kolesar and Riggs, 2004; Moseley and others, 2016; Coplen and others, 2021). References listed chronologically: Winograd, I.J., Szabo, B.J., Coplen, T.B., and Riggs, A.C., 1988, A 250,000-year climatic record from Great Basin vein calcite: implications for Milankovitch theory: Science, v. 242, p. 1275-1280, doi: 10.1126/science.242.4883.1275. Ludwig, K.R., Simmons, K.R., Szabo, B.J., Winograd, I.J., Landwehr, J.M., Riggs, A.C., and Hoffman, R.J., 1992, Mass-spectrometric Th-230-U-234-U-238 dating of the Devils Hole calcite vein: Science, v. 258, p. 284-287, doi: 10.1126/science.258.5080.284. Winograd, I.J., Coplen, T.B., Landwehr, J.M., Riggs, A.C., Ludwig, K.R., Szabo, B.J., Kolesar, P.T., and Revesz, K.M., 1992, Continuous 500,000-year climate record from vein calcite in Devils Hole, Nevada: Science, v. 258, p. 255-260, doi: 10.1126/science.258.5080.255. Coplen, T.B., Winograd, I.J., Landwehr, J.M., and Riggs, A.C., 1994, 500,000-year stable carbon isotope record from Devils Hole, Nevada: Science, v. 263, p. 361-365, doi: 10.1126/science.263.5145.361. Szabo, B.J., Kolesar, P.T., Riggs, A.C., Winograd, I.J., and Ludwig, K.R., 1994, Paleoclimatic inferences from a 120,000-year calcite record of water-table fluctuation in Browns Room of

Elemental concentrations and stable oxygen and carbon isotope ratios are reported for five mammillary calcite specimens collected from the groundwater-filled fissures Devils Hole and Devils Hole II in the southern Amargosa Desert, south-western Nevada. Previous studies of these specimens yielded oxygen and carbon isotope chronologies of paleoclimatic and paleo hydrologic conditions over an approximately 500,000-year time period as defined by uranium series dates (Winograd and others, 1992, 2006; Landwehr and others, 1997, 2011). The elemental concentration measurements reveal additional chronologies in the mammillary calcite. The specimens were sampled by milling contiguous 0.050-inch-thick layers (1.27 millimeters) oriented approximately parallel to the free, wetted growth faces of the specimens. For three of the five specimens (cores DH-10 and DH-11, hand specimen DH-7), the oxygen and carbon isotope measurements reproduce measurements of the same milled samples made by Landwehr and others (1997) and Coplen and others (2021). For the remaining specimens (hand specimens DHC2-3 and DHC2-8), the oxygen and carbon isotope measurements reproduce isotopic records published by Coplen and others (2021) but at a coarser resolution because Coplen and others (2021) analyzed milled layers of 0.010-inch thickness (0.25 millimeters). The elemental chronologies can be dated by referring to prior studies. For DH-11, uranium series dates and interpolated ages are given by Landwehr and others (1997). For DH-7 and DH-10, ages obtained by matching oxygen and carbon isotope chronologies to the dated chronologies of DH-11 are given by Coplen and others (2021). For DHC2-3 and DHC2-8, ages can be obtained by matching the oxygen and carbon isotope chronologies presented here to the higher-resolution dated chronologies provided by Coplen and others (2021). However, age assignments should be made with caution (see, for example, Moseley and others, 2016). Devils Hole and Devils Hole II are extensional tectonic fissures that open to the land surface adjacent to the major Ash Meadows ground-water discharge area. Devils Hole II is approximately 200 meters north of Devils Hole. The fissures intersect the regional groundwater table at about 17 meters and 36 meters below land surface at Devils Hole and Devils Hole II, respectively. These localities have long been important in paleoclimate research because mammillary calcite phreatically precipitated on the fissure walls has yielded a dated continuous paleotemperature proxy record that spans several glacial cycles (Winograd and others, 1988, 1992, 2006; Ludwig and others, 1992; Coplen and others, 1994; Riggs and others, 1994; Szabo and others, 1994; Plummer and others, 2000; Kolesar and Riggs, 2004; Moseley and others, 2016; Coplen and others, 2021). References listed chronologically: Winograd, I.J., Szabo, B.J., Coplen, T.B., and Riggs, A.C., 1988, A 250,000-year climatic record from Great Basin vein calcite: implications for Milankovitch theory: Science, v. 242, p. 1275-1280, doi: 10.1126/science.242.4883.1275. Ludwig, K.R., Simmons, K.R., Szabo, B.J., Winograd, I.J., Landwehr, J.M., Riggs, A.C., and Hoffman, R.J., 1992, Mass-spectrometric Th-230-U-234-U-238 dating of the Devils Hole calcite vein: Science, v. 258, p. 284-287, doi: 10.1126/science.258.5080.284. Winograd, I.J., Coplen, T.B., Landwehr, J.M., Riggs, A.C., Ludwig, K.R., Szabo, B.J., Kolesar, P.T., and Revesz, K.M., 1992, Continuous 500,000-year climate record from vein calcite in Devils Hole, Nevada: Science, v. 258, p. 255-260, doi: 10.1126/science.258.5080.255. Coplen, T.B., Winograd, I.J., Landwehr, J.M., and Riggs, A.C., 1994, 500,000-year stable carbon isotope record from Devils Hole, Nevada: Science, v. 263, p. 361-365, doi: 10.1126/science.263.5145.361. Szabo, B.J., Kolesar, P.T., Riggs, A.C., Winograd, I.J., and Ludwig, K.R., 1994, Paleoclimatic inferences from a 120,000-year calcite record of water-table fluctuation in Browns Room of

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 study type is Cave. The data include parameters of speleothems with a geographic location of Minnesota, United States Of America. The time period coverage is from 8517 to 0 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.