Microcharcoal Extraction (Other Keyword)
1-16 (16 Records)
The Warm Springs Valley Fault is a strike-slip fault in the northern Walker Lane, Washoe County, Nevada. In the autumn of 2018, a team from the University of Nevada, Reno (UNR) opened a trench across the Warm Springs Valley Fault. The objectives of the UNR geologists is to better understand the timing and recurrences of earthquakes related to the fault. Three sediment samples (Samples WSV_C14#11, WSV_C14#10, and WSV_C14#9) were submitted to PaleoResearch Institute by UNR to recover charcoal for...
CHARCOAL AND WOOD IDENTIFICATION, MACROFLORAL ANALYSIS, AND AMS RADIOCARBON DATING OF SAMPLES FROM THE FRIANT DAM, CALIFORNIA (2011)
A total of nineteen bulk soil samples, fourteen detrital charcoal samples, and one wood sample from along the San Joaquin River near Fresno, California, were examined to recover organic fragments suitable for radiocarbon dating. These samples were recovered from Holocene alluvium in soil pits downstream of Friant Dam and from auger holes in slackwater deposits upstream of the dam. Botanic components and detrital charcoal were identified, and potentially radiocarbon-datable material was...
CHARCOAL IDENTIFICATION AND AMS RADIOCARBON DATING OF SAMPLES FROM THE RINCON SPRINGS SITE, CALIFORNIA (2009)
Twelve charcoal samples were submitted for identification and AMS radiocarbon dating from the Rincon Springs Site in California. These samples were recovered from three separate trenches excavated in fan deposits. A total of eight radiocarbon dates were obtained.
EXAMINATION OF BULK SEDIMENT SAMPLES, MICROCHARCOAL EXTRACTION, AND AMS RADIOCARBON ANALYSIS OF ALLUVIUM FROM PALEOSEISMIC TRENCHES AT PAHRUMP, NEVADA (2010)
A total of six sediment samples were collected at the interface between a distal alluvial fan and playa surface in paleoseismic trenches at Pahrump, Nevada. These samples were examined for the presence of charred organic material suitable for AMS radiocarbon dating. In the absence of larger-sized charred remains, five the samples were extracted to recover microscopic charcoal/particulate soil organics for dating. One of these samples did not yield sufficient particulate soil organics; therefore,...
EXAMINATION OF BULK SEDIMENT SAMPLES, MICROCHARCOAL EXTRACTION, AND AMS RADIOCARBON ANALYSIS OF COLLUVIUM FROM TRENCH 5 AT THE LOS ANGELES RESERVOIR ULTRA VIOLET TREATMENT FACILITY, CALIFORNIA (2012)
A total of three bulk soil samples were collected from colluvium in Trench 5 at the Los Angeles Reservoir Ultra Violet Treatment Facility in southern California. These samples were examined for the presence of charred organic material suitable for AMS radiocarbon dating. In the absence of larger-sized charred remains, two of the samples were extracted to recover microscopic charcoal for dating. Two AMS radiocarbon dates were obtained for microscopic charcoal extracted from these sediments.
EXAMINATION OF BULK SOIL SAMPLES AND MICROCHARCOAL EXTRACTION FOR POTENTIAL RADIOCARBON DATABLE MATERIAL FROM WASATCH FAULT IN FLAT CANYON, UTAH (2014)
The project site is located at the mouth of Flat Canyon east of Salem, Utah. Soil samples were collected from a trench opened across the Wasatch Fault. Seventeen samples were submitted to recover and identify material appropriate for radiocarbon dating at the National Ocean Sciences Accelerator Mass Spectrometry Facility at Woods Hole Oceanographic Institution. In addition, one sample was submitted to recover microcharcoal in sufficient quantity for AMS radiocarbon age determination.
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 ELIZABETH LAKE PALEOSEISMIC SITE, CALIFORNIA (2014)
The Elizabeth Lake site is located in the town of Elizabeth Lake, 18 miles northwest of Palmdale, California. Nine soil samples, collected from two paleoseismic trenches opened across the San Andreas Fault, were submitted to recover and identify material appropriate for AMS radiocarbon age determination. In addition, microcharcoal extraction was requested for three samples.
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.
EXTRACTION OF SEDIMENT SAMPLES FOR RADIOCARBON DATABLE MATERIAL AND PARTICULATE ORGANIC MATERIAL FROM THE CHINO VALLEY ROAD CUT, ARIZONA (2010)
Four samples from an exposed fault graben in a road cut in Chino Valley, Arizona, were floated to recover charred material suitable for AMS radiocarbon dating. None of the samples yielded sufficient macrocharcoal for dating; therefore, the samples were processed in an attempt to recover microscopic charcoal/particulate soil organics for dating. Two of these samples yielded particulate soil organics that were submitted for dating.
IDENTIFICATION OF CHARCOAL AND AMS RADIOCARBON DATING OF CHARCOAL AND MICROCHARCOAL SAMPLES FROM SITE BRU FOR THE KERN CANYON FAULT STUDY, CALIFORNIA (2009)
Samples from colluvium at site BRU for the Kern Canyon Fault Study in Kern County, California, were examined to recover charred material suitable for AMS radiocarbon dating. Charcoal fragments in 14 samples from BRU were identified, and combined with microcharcoal for AMS radiocarbon dating. A total of 11 AMS radiocarbon dates were obtained.
MACROFLORAL IDENTIFICATION, MICROCHARCOAL EXTRACTION, AND AMS RADIOCARBON AGE DETERMINATION OF BULK SEDIMENT SAMPLES FROM THE 45TH AVENUE PROJECT, LOS ANGELES, CALIFORNIA (2016)
The 45th Avenue project site (Avenue 45th) is located on the southwest corner of Lincoln Avenue and Avenue 45 in Los Angeles, California. Four soil samples, collected from a boring and a trench in lacustrine deposits, were submitted for macrofloral analysis to recover and identify charred floral remains suitable for AMS radiocarbon age determination. Three samples from B-4 with expected dates between 15,000 and 6,000 years BP (John Helms, personal communication June 15, 2015) and one sample from...
MICROCHARCOAL ANALYSIS OF SEDIMENT FROM THE RANCH CENTER SLIP RATE SITE, LOS ANGELES COUNTY, CALIFORNIA (2017)
Two sediment samples were submitted for microscopic charcoal recovery (Table 1). Sample RT154 was large enough (9 mL) to work with, while sample RC503 was too small (<1 mL).
MICROCHARCOAL EXTRACTION OF A BULK SEDIMENT SAMPLE FROM THE RANCH CENTER SITE, LOS ANGELES COUNTY, CALIFORNIA (2017)
The Ranch Center Site is located approximately 10 km west of Palmdale, California. One bulk sediment sample was submitted for microcharcoal extraction in order to obtain radiocarbon datable materials.
PHYTOLITH, MACROFLORAL, PROTEIN RESIDUE, AND AMS RADIOCARBON DATING AT SITES 32OL551 AND 32OL552, NORTH DAKOTA (2011)
Samples from stone rings at sites 32OL551 and 32OL552 in west-central North Dakota were examined for phytoliths and macrofloral remains to determine that plant resources were utilized by the occupants of these sites. Microscopic charcoal was extracted from the stone ring sediments and submitted for AMS radiocarbon dating, yielding three radiocarbon dates. Lithic tools from the stone rings at 32OL551 also were examined for protein residues to provide information concerning animals that may have...
POLLEN AND MACROFLORAL ANALYSIS, CHARCOAL IDENTIFICATION, MICROCHARCOAL EXTRACTION, AND AMS RADIOCARBON AGE DETERMINATION OF SAMPLES FROM SITE 42WS1220, WASHINGTON COUNTY, UTAH (2018)
Site 42WS1220 is an open campsite located in the Saint George Basin, Washington County, Utah. The site is situated on three active dunes along the eastern side of Cottonwood Wash with Interstate 15 north-bound lanes running through it. The site produced multiple features, lithics, ground stones, and ceramics dating between the Archaic period and the Puebloan and South Pauite periods (Aaron Woods, personal communication, November 14, 2018). Two thermal feature fill sediments were submitted for...