Abstract
A much improved high-resolution integrated stratigraphy (calcareous plankton biostratigraphy, magnetostratigraphy,
cyclostratigraphy) is presented for the classic section of Oued Akrech (Atlantic Morocco) straddling the
Tortonian^Messinian boundary. Magnetobiostratigraphic correlations with time-equivalent and astronomically dated
sections in the Mediterranean indicate that cyclic alternations of indurated light beige coloured marls and softer, more
clayey and reddish coloured
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