Aminostratigraphic framework for marine deposits of northwestern Alaska. The mean isoleucine epimerization ratio (aIle/Ile) and associated standard deviation are plotted against site latitude and present mean annual temperature (MAT). Lines connecting aminostratigraphic units at Nome and the Arctic Coastal Plain are based on provisional correlations discussed in the text.

(Figure 4 from Kaufman, D.S. and Brigham-Grette, J.,1993., Aminostratigraphic correlations and paleotemperature implications, Pliocene-Pleistocene high sea level deposits, northwestern Alaska. Quaternary Science Reviews, 1993. vol. 12, 21-33)

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