Amino acid racemization dating of fossil bones

The development of amino acid racemization as a dating technique holds considerable promise for resolving questions of human evolution and culture histories. The advantages of this method are: fossil bone can be directly dated; only gram quantities are needed for analysis; and the range extends beyond that of radiocarbon. Amino acid racemization rates are dependent upon both time and temperature. In order to eliminate the need for evaluating the temperature history of a bone before it can be dated by racemization, a procedure has been developed wherein the in situ racemization rate is determined from the extent of racemization in a radiocarbon‐dated bone. Once this ‘calibration’ has been completed for a particular site, other bones from the area can be dated. Racemization ages deduced using this procedure are shown to be in close agreement with radiocarbon dates. The effects which other physical factors (pH, humidity, leaching) have on racemization rates are discussed. Because of the close correlation between temperatures calculated from in situ racemization rates (under diverse environmental conditions) and actual mean annual temperatures at various sites throughout the world, we conclude that factors other than temperature have very small effects on the reaction rate. The use of amino acid racemization in dating fossil man is illustrated by the racemization analyses of several North American paleo‐indian skeletons, the results of which provide additional evidence that man was present in North America more than 40,000 years ago

Absolute dating · Diagenesis · Racemization · Radiocarbon dating · Archaeology and ancient environmental studies · Chemistry · Forensic Anthropology and Bioarchaeology Studies · Geology · Organic Chemistry · Paleontology · Pleistocene-Era Hominins and Archaeology

• The Relevance of Old World Archaeology to the First Entry of Man into New Worlds

  Open Access•Sylvia J Hallam•Quaternary Research•1977

  Incluir item

• Accuracy of North American Human Skeleton Ages

  Open Access•Thomas W Stafford, P E Hare et al.•Quaternary Research•1990

  Incluir item

• Amino Acid Geochemistry of Fossil Bones from the Rancho La Brea Asphalt Deposit, California

  Open Access•Mark A S Mcmenamin, David J Blunt et al.•Quaternary Research•1982

  Incluir item

• The Woman Who Married the Bear

  Barbara Alice Mann, Kaarina Kailo•Woman Who Married the Bear•2023

  Incluir item

• Carbon-14 dates point to man in the Americas 32,000 years ago

  Open Access•Niede Guidon, Georgette Delibrias•Nature•1986

  Incluir item

• Complementary Use of Amino-Acid Epimerization and Radiocarbon Analysis for Dating of Mixed-Age Fossil Assemblages

  Glenn A Goodfriend•Radiocarbon•1989

  Incluir item

• Aspartic Acid Racemization and Radiocarbon Dating of an Early Milling Stone Horizon Burial in California

  Open Access•Darcy Ike, Jeffrey L Bada et al.•American Antiquity•1979

  Incluir item

• Xronos

  Open Access•Joe Roe, Clemens Schmid et al.•Journal of Computer Applications…•2025

  Incluir item

• A review of the chronology of the European Middle Pleistocene hominid record

  Open Access•Jill Cook, C B Stringer et al.•American Journal of Physical…•1982

  Incluir item

• Assessment of integrity and geochronology of archaeological sites using amino acid racemization in land snail shells

  Open Access•G Lain Ellis, Gene Ellis et al.•Geoarchaeology•1996

  Incluir item

• Soil Temperature Monitoring at Lake Mungo

  W R Ambrose•Australian Archaeology•1984

  Incluir item

• The Application of Electron Spin Resonance Dating to Holocene Bone

  D A Caddie, H J Hall et al.•Australian Archaeology•1984

  Incluir item

• Racemization of Amino Acids in Nature

  Jeffrey L Bada•Interdisciplinary Science Reviews•1982

  Incluir item

• Accelerator radiocarbon dating at the molecular level

  Open Access•Thomas W Stafford, P E Hare et al.•Journal of Archaeological Science•1991

  Incluir item

• The effects of demineralisation and sampling point variability on the measurement of glutamine deamidation in type I collagen extracted from bone

  Open Access•Joanna Simpson, J P Simpson et al.•Journal of Archaeological Science•2016

  Incluir item

• Amino acid racemization in mammalian bones and teeth from La Chaise‐de‐Vouthon (Charente), France

  Open Access•Bonnie A B Blackwell, Bonnie Blackwell et al.•Geoarchaeology•1990

  Incluir item

• The Contribution of Radiocarbon Dating to New World Archaeology

  Open Access•R E Taylor•Radiocarbon•2000

  Incluir item

• Non-Concordance of Radiocarbon and Amino Acid Racemization Deduced Age Estimates on Human Bone

  Open Access•R E Taylor•Radiocarbon•1983

  Incluir item

• Six Decades of Radiocarbon Dating in New World Archaeology

  Open Access•R E Taylor•Radiocarbon•2009

  Incluir item

• Use of AMS 14 C Analysis in the Study of Problems in Aspartic Acid Racemization-Deduced Age Estimates on Bone

  Open Access•Paul Ennis, E A Noltmann et al.•Radiocarbon•1986

  Incluir item

• Archaeological Applications of Amino Acid Racemization

  Open Access•Bonnie Johnson, B J JOHNSON et al.•Archaeometry•1997

  Incluir item

• Direct Aspartic Acid Racemization Dating of Human Bones From Archaeological Sites of Central Southern Italy

  Open Access•G BELLUOMINI•Archaeometry•1981

  Incluir item

• Additional upper pleistocene human remains from Vindija cave, Croatia, Yugoslavia

  Open Access•Fred H Smith, Donna C Boyd et al.•American Journal of Physical…•1985

  Incluir item

• Direct dating of human fossils

  Open Access•Rainer Grün•American Journal of Physical…•2006

  Incluir item

• The archaeology of radiocarbon accelerator dating

  Open Access•J A J Gowlett•Journal of World Prehistory•1987

  Incluir item

• Working with the Public

  Open Access•Jan Freedman, Jane Evans•Open Quaternary•2015

  Incluir item

• Accelerator Radiocarbon Dates on Charcoal, Shell, and Human Bone from the Del Mar Site, California

  Open Access•Thomas W Stafford, Rose A Tyson•American Antiquity•1989

  Incluir item

• Major Revisions in the Pleistocene Age Assignments for North American Human Skeletons by C-14 Accelerator Mass Spectrometry

  Open Access•R E Taylor, Louis A Payen et al.•American Antiquity•1985

  Incluir item

• Aspartic Acid Racemization Ages of California Paleoindian Skeletons

  Open Access•Jeffrey L Bada•American Antiquity•1985

  Incluir item

• Geology of the Olduvai Gorge

  Richard L Hay, Richard Hay•Geology of the Olduvai Gorge•1976

  Incluir item

• Environment and Archaeology

  Anthony J Tankard, Karl W Butzer•The South African Archaeological…•1973

  Incluir item

• World Survey of Climatology

  Open Access•H P Bailey, H E Landsberg et al.•Geographical Review•1975

  Incluir item

• Environment and subsistence of prehistoric man in the southern Cape Province, South Africa

  R G Klein•World Archaeology•1974

  Incluir item

• Stratigraphy, archaeology, and age of the Ndutu and Naisiusiu Beds, Olduvai Gorge, Tanzania

  Mary D Leakey, Richard L Hay et al.•World Archaeology•1972

  Incluir item