This dataset includes tables of radiocarbon, uranium thorium series, and luminescence geochronologic ages and stable carbon and oxygen isotope compositions for sedimentary and organic samples.

This dataset includes tables of radiocarbon, uranium thorium series, and luminescence geochronologic ages and stable carbon and oxygen isotope compositions for sedimentary and organic samples.

This data release contains radiocarbon dates and clumped isotope ratios for soil carbonates as well as observed soil temperatures for study sites in the San Luis Valley, Colorado and New Mexico, USA.

This data release contains radiocarbon dates and clumped isotope ratios for soil carbonates as well as observed soil temperatures for study sites in the San Luis Valley, Colorado and New Mexico, USA.

The dataset includes whole-rock geochemistry and 40Ar-39Ar geochronology for Pleistocene to Oligocene volcanic and intrusive rocks. These data support figures and tables in days 2 and 3 of the Field-trip guide to continental arc to rift volcanism of the southern Rocky Mountains-Southern Rocky Mountain, Taos Plateau, and Jemez Mountains volcanic fields of southern Colorado and northern New Mexico (Thompson and others, 2022). Additional 40Ar-39Ar geochronology data are included for age reported in the Geologic map of Ute Mountain quadrangle (Thompson and others, 2014b) and the Geologic map of Sunshine quadrangle (Thompson and others, 2014a). Other samples not associated with any of these referenced publications are also included. > There may be slight variation in the ages reported here and other previously reported ages on the geologic maps for the Sunshine and Ute Mountain quadrangles (Thompson and others 2014a,b) and some ages originally reported on the Geologic map of the San Antonio Mountain area (Turner and others, 2017) due to statistical methods used in calculating the age.

The dataset includes whole-rock geochemistry and 40Ar-39Ar geochronology for Pleistocene to Oligocene volcanic and intrusive rocks. These data support figures and tables in days 2 and 3 of the Field-trip guide to continental arc to rift volcanism of the southern Rocky Mountains-Southern Rocky Mountain, Taos Plateau, and Jemez Mountains volcanic fields of southern Colorado and northern New Mexico (Thompson and others, 2022). Additional 40Ar-39Ar geochronology data are included for age reported in the Geologic map of Ute Mountain quadrangle (Thompson and others, 2014b) and the Geologic map of Sunshine quadrangle (Thompson and others, 2014a). Other samples not associated with any of these referenced publications are also included. > There may be slight variation in the ages reported here and other previously reported ages on the geologic maps for the Sunshine and Ute Mountain quadrangles (Thompson and others 2014a,b) and some ages originally reported on the Geologic map of the San Antonio Mountain area (Turner and others, 2017) due to statistical methods used in calculating the age.

Samples, sample depths, paleomagnetism, and magnetic susceptibility parameters are recorded for BP-3-USGS well, San Luis Valley, Southwestern Colorado

This dataset includes tables of stratigraphic age-depth information for Paisley Caves 2 and 5, in Oregon U.S.A., along with tables of stable and strontium isotopic data for fish remains and geological samples from the study area surrounding the Paisley Caves.

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 method) and initial 234U/238U activity ratios for samples of pedogenic carbonate formed in soils on alluvial fans in the San Luis Valley, Colorado, USA.

This data release provides geochemical, sedimentological, and geochronological data from interbedded fluvial and marsh deposits and radiocarbon dates of the section spanning the last 1500 years from the Pallett Creek paleoseismic site, California. The samples were collected to support paleoenvironmental reconstruction of the site and refine several previous investigations of paleoearthquakes along the San Andreas Fault (Sieh, 1978; Sieh, 1984; Sieh et al., 1989; Biasi and Weldon, 1994; Scharer et al., 2011). Geochemical and sedimentological data include grain size, magnetic susceptibility, dry bulk density, percent total organic matter, and percent total carbonate at contiguous 1 cm spacing and carbon (total C) to nitrogen (total N) ratios and charcoal counts every 4 cm from a 6.2 m section at the Pallett Creek paleoseismic site (34.4557°, -117.8872°). The data release also includes new and previously published radiocarbon datasets and associated depths to facilitate inter-study comparison. These datasets include: (1) New accelerator mass spectrometry (AMS) radiocarbon dates, completed in 2021 and 2022, targeting layers with few or conflicting dates in previous studies at the Pallett Creek paleoseismic site. For these samples, the types of taxa present in selected layers was determined. (2) AMS dates originally reported in Scharer et al. (2011) are included with amended d13C fractionation corrections and are assigned depths to the 6.2 m section at the Pallett Creek paleoseismic site. (3) Depths are assigned for conventional radiocarbon dates previously reported in Sieh (1978), Sieh et al. (1984), Sieh et al. (1989) and Biasi and Weldon (1994). The depth estimates enable use of the original studies with the newer stratigraphic and age data provided in the data release. (4) New radiocarbon dates from the same alluvial surface as the Pallett Creek paleoseismic site that are exposed ~1 km upstream (34.4536°, -117.8980°). This report should be used as the supplementary materials for any publication(s) that uses the sedimentologic and geochemical data or taxa identification or radiocarbon dates and depths reported herein. Revision 2.0 by Katherine M. Scharer on February 6, 2024. To review the changes that were made see 'Versioning.txt' file in the Attached Files section on the data release landing page.