Abstract

Amplitude variations of the gamma-ray record of late Miocene hemipelagic successions on Crete correlate remarkably well with the amplitude variations of a published theoretical insolation curve. Chemical analyses of the sediments show a linear relation between radiation (total counts above 400 keV) and U enrichment due to authigenic formation of U-containing minerals under anaerobic conditions. The studied sections, which are paleomagnetically and biostratigraphically and cyclostratigraphically well constrained and more than 100 km apart, can be correlated on basis of gamma-ray count rates.

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