megafauna extinction (Other Keyword)

1-2 (2 Records)

Modelling Age and Sedimentation Rates at the Page-Ladson Site (2017)
DOCUMENT Citation Only David Carlson. Angelina Perrotti. Michael Waters. Jessi Halligan.

Stone tools and mastodon bones occur in an undisturbed geological context at the Page-Ladson site, Florida. Age models were created for excavation unit 50N/23E and core PLAD-AUC14-4A to estimate age ranges and sedimentation rates. The models were constructed using Bayesian models as implemented in OxCal to calibrate ages, combine equivalent age estimates, exclude outliers, and estimate deposition rates. The models were used to provide age estimates for artifacts recovered from the site,...

Protecting Our Fossil Fuel: Bone Dates, Date-Assessment Protocols, and the Need for a Worldwide 14C Database (2017)
DOCUMENT Citation Only James Oliver. Russell Graham. Thomas Stafford, Jr..

Large datasets of bone 14C dates are the foundation of integrative research in Late Quaternary faunal paleoecology, biogeography, paleogenetics, responses to environmental change, extinction occurrences and rates, and roles of climate and humans in the extinction process. This research requires strict date-assessment protocols including knowledge of material dated, taxon, sample chemistry, fraction dated, isotopic and C/N values. Currently, however, using 50+ years of 14C dates and implementing...