Juan M. Insua Arévalo, José Jesús Martínez Díaz, Julián García Mayordomo, F. Martín García, Ramón Capote del Villar
Three different generations of alluvial-fans have been identified at the northern border of Mijas range. The oldest generation is formed by debris-flow deposits showing an striking calcrete development of more than 30 m thick. The second generation is also formed by debris-flow deposits with important calcrete development (10 m max.). Finally, the third generation is formed by sheet-flow deposits with no calcrete development. Accordingly, the relative age of each depositional phase has been estimated in Pliocene, Lower-Middle Pleistocene and Upper Pleistocene-Holocene. The depositional phases show important dissimilarities from the western- to the eastern-sector of the mountain border. The oldest generation is only preserved at the western-sector, and the intermediate age generation is placed here at a higher elevation than in the eastern-sector. Furthermore, in the western-sector the youngest generation displays a distal-accretion off-lap arrangement in contrast to the proximal-accretion on-lap arrangement displayed in the eastern-sector. These significant dissimilarities are attributed to tectonic causes
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