Estudio mineralógico de los arenales costeros de San Sebastián de La Gomera



The mineralogical study of sand frm the beach of San Sebastián de La Gomera has taken plaoe, applying khniques of granulometry, calcimetry, separation of the light and heavy fractions trough heavy liquids and difractometry of X rays. The percentage of heavy minerals excedes a0 per cent. The nlost important and abundant mineralogical species is the augite and the sediments lack quartz and the biaclasts are very scarce. The material which forms the sediment is completely val- canic in iBs origin and has been formed by the movement of the chasm which breaks away from Lomo Fragoso of which it is a terminal point, and by the costal abrasion.

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