AMS Radiocarbon Analysis (Other Keyword)
76-100 (283 Records)
A total of 26 sediment samples and 2 peat samples from along the Skokomish River in western Washington were water-screened to recover organic fragments suitable for radiocarbon analysis. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Charcoallbark fragments from eight of the samples and the two peat samples were submitted for AMS radiocarbon analysis. In addition, a wood section from a stump buried in a stream was...
EXAMINATION OF BULK SOIL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM PALEOSEISMIC TRENCHES 2 AND 3 AT THE FILOLI SITE, WOODSIDE, SAN MATEO COUNTY, CALIFORNIA (2015)
The Filoli paleoseismic site is located on the San Andreas Fault in Woodside, San Mateo County, California. Bulk soil samples collected from the north wall of Trench 2 and from the south and north walls of Trench 3 were submitted for macrofloral analysis to recover charred remains suitable for AMS radiocarbon age determination. One to four different charred remains from every sample were selected, yielding a total of 30 AMS radiocarbon dates.
EXAMINATION OF BULK SOIL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM THE COLUMBIA RIVER, WASHINGTON (2015)
Sites CR1, CR2, and CR3 comprise Holocene terraces located immediately below the Grand Coulee Dam along the Columbia River, Ferry County, Washington. Two bulk soil samples from each site were submitted for macrofloral analysis. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Additionally, three samples underwent microscopic charcoal recovery due to insufficient macroscopic charcoal. Two microscopic charcoal samples were...
EXAMINATION OF BULK SOIL AND AMS RADIOCARBON ANALYSIS OF MATERIAL FROM EAST CANYON TRENCH, UTAH (2006)
A total of eight bulk soil samples from the East Canyon Trench in Summit County, Utah, were floated to recover organic fragments suitable for radiocarbon analysis. These samples were recovered from trenches along the East Canyon fault, a northeast-trending range-front fault generally bounding the northern side of the intermontane valley between East Canyon and Croyden in the Wasatch Range (Black and Hecker 1999). Botanic components and detrital charcoal were identified, and potentially...
EXAMINATION OF BULK SOIL AND AMS RADIOCARBON ANALYSIS OF MATERIAL FROM EAST CANYON TRENCH, UTAH (2006)
A total of eight bulk soil samples from the East Canyon Trench in Summit County, Utah, were floated to recover organic fragments suitable for radiocarbon analysis. These samples were recovered from tenches along the East Canyon fault, a northeast-trending range-front fault generally bounding the northern side of the intermontane valley between East Canyon and Croyden in the Wasatch Range (Black and Hecker 1999). Botanic components and detrital charcoal were identified, and potentially...
EXAMINATION OF BULK SOIL AND AMS RADIOCARBON DATING OF MATERIAL FROM PALEOSEISMIC TRENCHES ACROSS THE BULNAY FAULT, MONGOLIA, AND THE SAN ANDREAS FAULT, CALIFORNIA (2010)
A total of six bulk soil samples from paleoseismic trenches were floated to recover organic fragments suitable for radiocarbon analysis. Three samples were recovered from the Bulnay Fault in northern Mongolia and from the San Andreas Fault in northern California. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of 11 AMS radiocarbon dates were obtained.
EXAMINATION OF BULK SOIL AND CHARCOAL, AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM THE ROVNER SIMI PROJECT, SIMI VALLEY, CALIFORNIA (2014)
A selection of bulk soil samples collected from trenches and augers excavated as part of the Rovner Simi Project, Simi Valley, southern California, were floated to recover organic fragments suitable for radiocarbon age determination. In addition, two charcoal samples also were submitted for identification and microscopic charcoal was extracted from five sediment samples. Botanic components and charcoal fragments were identified, and optimal radiocarbon datable material, including microcharcoal,...
EXAMINATION OF BULK SOIL AND MICROCHARCOAL EXTRACTION OF SAMPLES FROM THE JERD CREEK PALEOSEISMIC TRENCH SITE, NAPA COUNTY, CALIFORNIA (2012)
A total of six bulk soil samples were collected from a paleoseismic trench at the Jerd Creek trench site on the Berryessa section of the Green Valley Fault, California. These samples were examined for the presence of charred organic material suitable for AMS radiocarbon dating. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. In the absence of larger-sized charred remains, four of the samples were extracted to recover...
EXAMINATION OF BULK SOIL FROM PALEOSEISMIC TRENCHES ACROSS THE HAYWARD FAULT AND THE SAN ANDREAS FAULT NEAR SAN FRANCISCO, CALIFORNIA (2012)
A total of six bulk soil samples from paleoseismic trenches near San Francisco, California, were floated to recover organic fragments suitable for radiocarbon dating. Four samples were recovered from a trench across the Hayward Fault, while two samples were collected from a trench across the San Andreas Fault. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of eight AMS radiocarbon dates were obtained on charred...
EXAMINATION OF BULK SOIL FROM PALEOSEISMIC TRENCHES ACROSS THE SAN ANDREAS FAULT NEAR SAN FRANCISCO, CALIFORNIA (2012)
A total of ten bulk soil samples from paleoseismic trenches near San Francisco, California, were floated to recover organic fragments suitable for radiocarbon dating. Samples were collected from trenches across the San Andreas Fault at Crystal Springs South (11CSS). Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Eight radiocarbon dates were obtained.
EXAMINATION OF BULK SOIL SAMPLES AND MICROCHARCOAL EXTRACTION FOR POTENTIAL RADIOCARBON DATABLE MATERIALS FROM THE ZEBRA TRENCH ON THE CANYON RIVER FAULT, GRAYS HARBOR COUNTY, WASHINGTON (2017)
The Zebra trench site is situated in the Wynoochee River Valley approximately 30 miles north of Montesano in Greys Harbor County, Washington. Three bulk samples, collected from a paleoseismic trench located where the Canyon River fault cuts across a series of fluvial terraces (Scott Bennet, personal communication March 20, 2017), were submitted to recover and identify material appropriate for AMS radiocarbon age determination. Microscopic charcoal extraction also was requested for one of these...
EXAMINATION OF BULK SOIL SAMPLES FOR POTENTIAL RADIOCARBON DATABLE MATERIAL FROM THE FRAZIER MOUNTAIN PALEOSEISMIC SITE, LOS ANGELES COUNTY, CALIFORNIA (2015)
The Frazier Mountain Paleoseismic Site is situated along the San Andreas Fault near Gorman, California. Two samples, collected from an alluvial fan on the northern slope of Frazier Mountain (Kate Scharer, personal communication June 17, 2015) were submitted for macrofloral analysis to recover and identify charred botanic remains and charcoal suitable for AMS radiocarbon age determination.
EXAMINATION OF BULK SOIL, IDENTIFICATION OF DETRITAL CHARCOAL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM EL VADO DAM PALEOFLOOD STUDY RIO CHAMA, NEW MEXICO (2012)
Twelve bulk soil samples and twenty-eight detrital charcoal samples were examined to recover organic fragments suitable for radiocarbon age determination. These samples were recovered from stream deposits along the Rio Chama River in the Rio Grande Basin near El Vado Dam and Reservoir, New Mexico. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of nine radiocarbon dates were obtain on charcoal from these samples.
EXAMINATION OF BULK SOIL, IDENTIFICATION OF DETRITAL CHARCOAL, AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL COLLECTED ALONG GRIZZLY CREEK, OREGON (2011)
One bulk soil sample and twelve detrital charcoal samples were examined for the presence of organic material suitable for radiocarbon age determination. These samples were recovered from Holocene alluvium along Grizzly Creek downstream of Howard Prairie Dam, near Klamath Falls in the south-central Oregon. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of five radiocarbon dates were obtained from charcoal fragments.
EXAMINATION OF BULK SOIL, IDENTIFICATION OF DETRITAL CHARCOAL, AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL COLLECTED ALONG THE MIDDLE FORK FEATHER RIVER, CALIFORNIA (2011)
One bulk soil sample and two detrital charcoal samples were examined to recover organic fragments suitable for radiocarbon age determination. These samples were recovered from fluvial terraces along the Middle Fork Feather River and from glacial till exposed above Jamison Creek in the Mohawk Valley, northeastern California. The botanic components and detrital charcoal were identified, and the potentially radiocarbon-datable material was separated. A total of four radiocarbon dates were obtained...
EXAMINATION OF BULK SOIL, IDENTIFICATION OF DETRITAL CHARCOAL, AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL COLLECTED ALONG WEBER RIVER AND CHALK CREEK, UTAH (2011)
Two bulk soil samples and thirty-six detrital charcoal samples were examined to recover organic fragments suitable for radiocarbon age determination. These samples were recovered from stream deposits along the Weber River and Chalk Creek in the Weber River Basin, near Echo Dam and Reservoir and upstream of Wanship Dam and Rockport Lake, northern Utah. The botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of twelve...
EXAMINATION OF BULK SOIL, IDENTIFICATION OF DETRITAL CHARCOAL, AND AMS RADIOCARBON AGE DETERMINATION OF SAMPLES FROM NORTH FORK RED RIVER, OKLAHOMA (2011)
A total of nine bulk soil samples and twenty detrital charcoal samples collected along the North Fork Red River in the Red River Basin near Altus Dam and Reservoir, Oklahoma, were examined to recover organic fragments suitable for radiocarbon age determination. These samples were recovered from stream deposits along the North Fork Red River. The botanic components and detrital charcoal were identified, and the material that was potentially radiocarbon-datable was separated. A total of eleven...
EXAMINATION OF BULK SOIL, MICROCHARCOAL EXTRACTION, AND AMS RADIOCARBON AGE DETERMINATION OF SAMPLES FROM THE DRUM MOUNTAINS PALEOSEISMIC TRENCH, MILLARD COUNTY, UTAH (2016)
The Drum Mountains Paleoseismic Trench lies approximately 5–10 km west of Delta in Millard County, Utah. Two bulk soil samples collected from colluvial wedge (fault) deposits in a paleoseismic trench were submitted for macrofloral analysis. Botanic components including charcoal were identified, and potentially radiocarbon datable material was separated. In addition, microscopic charcoal recovery and AMS radiocarbon age determination was requested for both samples.
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON AGE DETERMINATION FOR SAMPLES FROM THE SCOGGINS LANDSLIDE STUDY, OREGON (2012)
Three sediment samples and three detrital charcoal samples from a landslide study near Forest Grove, Oregon, were examined to recover organic fragments suitable for radiocarbon age determination. One additional wood sample also was submitted. These samples were recovered from a sag pond on a landslide slope and from backhoe-dug holes on or near landslide deposits. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of five...
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM SITES ALONG THE NORTH FORK MALHEUR RIVER, AGENCY VALLEY, OREGON (2015)
Located below the Beulah Reservoir along the North Fork Malheur River, Agency Valley, Oregon, sites NFM1, NFM2, NFM3, and NFM4 represent pits excavated in gravely and fine-grained Holocene terraces (Tessa Harden, personal communication March, 2015). Excavations produced eight bulk soil and eight detrital charcoal samples for identification of charred floral remains suitable for AMS radiocarbon age determination (Tessa Harden, personal communication March, 2015). In addition, one bulk sample...
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM SITES ALONG THE WHITE RIVER ON THE WHITE MOUNTAIN APACHE RESERVATION, EAST-CENTRAL ARIZONA (2012)
One bulk soil sample and thirty-seven detrital charcoal samples were examined for the presence of organic material suitable for radiocarbon age determination. These samples were recovered from several Holocene terraces along the White River on the White River Apache Reservation, near the town of Pinetop in east-central Arizona. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of nine radiocarbon dates were obtained from...
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON AGE DETERMINATION OF MATERIAL FROM SITES TRCR1, TRCR2, TRCR4, TRCR5, AND TRCR6 ALONG TAYLOR RIVER, COLORADO (2014)
Six bulk soil samples and seventeen detrital charcoal samples from sites TRCR1, TRCR2, TRCR4, TRCR5, and TRCR6 along Taylor River in Gunnison County, central Colorado, were analyzed to recover organic remains suitable for radiocarbon age determination. Samples were collected from Holocene terraces at a reach downstream of Taylor Park Reservoir. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Five radiocarbon dates were...
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON ANALYSIS OF MATERIAL FROM ALONG THE BLUE RIVER FOR THE GREEN MOUNTAIN DAM PALEOFLOOD STUDY, COLORADO (2010)
Two bulk soil samples and 61 detrital charcoal samples were examined to recover organic fragments suitable for radiocarbon analysis. These samples were collected from stream deposits along the Blue River in the Lower Blue River Basin near Green Mountain Dam and Reservoir in western Colorado. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Six radiocarbon dates were obtained.
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON ANALYSIS OF MATERIAL FROM ALONG THE HOKO RIVER, WASHINGTON (2010)
A single bulk soil sample and 21 detrital charcoal samples were examined to recover organic fragments suitable for radiocarbon analysis. These samples were collected from stream deposits along the Hoko River on the northern Olympic Peninsula, Washington. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. A total of three radiocarbon dates were obtained.
EXAMINATION OF BULK SOIL/DETRITAL CHARCOAL AND AMS RADIOCARBON ANALYSIS OF MATERIAL FROM ALONG THE PROVO AND WEBER RIVERS, UTAH (2005)
Three samples from along rivers in northern Utah were examined to recover organic fragments suitable for radiocarbon analysis. These samples were recovered from the Deer Creek Campground on the Provo River, as well as from the Diston and Richins Properties on the Weber River. Botanic components and detrital charcoal were identified, and potentially radiocarbon datable material was separated. Charcoal from one sample was selected for AMS radiocarbon analysis.