Nuevas acotaciones al alcance del método de datación por análisis de racemización de aminoácidos. Sección de Cuesta Colorada (Almería SE de España)

Abstract

New data about the age of Cuesta Colorada (Almería, Spain) are presented. Evidency from micropaleontological sampling and new palaeomagnetical studies, allowed us to correlate the almost whole section with the I and II Pliocene Units. An undoubtfull palaeomagnetical reversal found in an intensively sampled micritic layer, could represent the Causs-Matuyama boundary, confirming the data from amino acid racemization analyses which indicate a wide time span between both the bottom and the top of Cuesta Colorada deposition time. Samples taken from a very deeply excavated road cut allowed very well preserved amino acid and palaeomagnetic samples taking, being possible to enlarge the normal amino acid dating method range which in very favourable conditions could reach the upper part of Lower Pleistocene time