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Loess is a special case in which an overestimation of ages is systematically observed due to insufficient bleaching turbulent transport clouds preventing sunlight contact.
In the field, sediment should be examined for evidence of disturbance such as bioturbation from roots or animalspedogenic processes clay illuviation or segregation or post-depositional reworking because it can mix grains of different ages in a sedimentary profile or alter dose rate conditions over time, respectively Bateman et al.
Preparing sharks' teeth for dating required total preparation times averaging less than 2 hours per subsample, making it an inexpensive technique.
Radiation-sensitivity for the ESR signal is similar in all three species, with saturation occurring after 3-4 Mrad of total radiation dose.
Tests for dating accuracy now need to be completed.© Copyright 2002 The Geological Society of America (GSA), all rights reserved.
& Central Park W, New York, NY 10024-5192Enameloid from three species of fossil sharks was examined for its suitability for ESR dating analysis.