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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 AMS radiocarbon age determination, with the goal of providing a timeline of earthquakes at the fault.

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 pollen analysis. Three additional thermal feature fill sediments were submitted for macrofloral analysis, charcoal identification, microcharcoal extraction, and/or AMS radiocarbon age determination.

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 ST-1 were submitted for radiocarbon analysis.

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.

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.