Archaeological results from accelerator dating dating az znokomstva
Bones with ≥0·1-0·2% N and collagenous compositions can be dated accurately because structural collagen is present; contaminants are removable with XAD resin. PY - 1991Y1 - 1991N2 - Molecular level 14C dating is the isolation of specific classes of molecules for their 14C dating by accelerator mass spectrometry (AMS).
Bones with ≤0·1% N and non-collagenous compositions yield dates hundreds to thousands of years too young because most of the preserved organic matter is exogenous. Complex matrices such as fossil bone are difficult to date due to their extreme chemical heterogeneity.
Radiocarbon dating has been around for more than 50 years and has revolutionized archaeology.KW - C dating KW - Ams dating KW - Quaternary extingctions UR - History, anthropology, and archaeology are three distinct but closely related bodies of knowledge that tell man of his present by virtue of his past.AMS 14C dating of amino acids demonstrated that (1) post 10,800 year ages for North American megafauna are due to sample contamination, not Holocene ages on extinct fauna, (2) a Clovis age (10,900 years) was established for a human fossil from the Anzick site, Montana, (3) Holocene ages cannot be established absolutely for many North American human fossils because the bones were non-collagenous, (4) accurate ages are attainable on vertebrate fossils as small as passerine birds from Pacific Island localities, (5) well preserved bones are datable without their destruction by extracting protein with water at high temperatures, and (6) stratigraphic anomalies to 45,000 years in European Upper Paleolithic rock shelters are recognizable by dating bone directly.