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Amino Acid Racemization (AAR) Data


Amino Acid Molecular Diagram, image from Wikipedia Commons 200px-AminoAcidball.svg.png Most amino acids can have two different configurations, "D" or "L". Living organisms generally have amino acids in the "L" configuration, but when the organism dies, the ratio of D/L moves slowly toward equilibrium, a process called racemization. Measuring the ratio of D/L in a geologic sample containing preserved amino acids can therefore allow calculations of the age of the sample.


Albemarle Embayment and Central Arctic Ocean AAR sample locations:
Site Map of Albemarle Embayment AAR samples Site Map of Arctic AAR samples

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Last Updated Wednesday, 26-Sep-2012 13:02:09 EDT by paleo@noaa.gov
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