Microcharcoal (Material Keyword)
1-5 (5 Records)
Two soil samples were submitted for AMS radiocarbon dating from Cosigüina Volcano, Nicaragua. The client requested the samples be processed via the microcharcoal recovery and radiocarbon pretreatment technique that were developed by PaleoResearch Institute. The client estimated Sample COS–G–52 to be ca., 30,000 years old and Sample COS–H–68 to be ca., 20,000 years old.
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 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, 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.
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...