The feldspatic sand deposit mined by INCUSA, is situated in Carrascal del Río, in the north of the Province of Segovia. The sand deposit is of eolic origin, del paelozolic period, on the north side of the Sierra de Guadarrama. The main characteristics of this deposit are the homogeneity and the quality of the silica sand and of the potassium feldspar contained.

On the other hand, it is important to underline that the confirmed reserves are estimated at more than 250 millions of tons.  

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