Le Bentoniti della Sardegna settentrionale: nota: 1.

In this note the authors relate about some deposits of bentonite in the Northern Sardinia. This island is very interesting in order to bentonites that are among the most important in Europe. This work characterises each deposit describing it in geografical situation. Chemical, technological and X-ray analysis have been executed. Each deposit is described in its geology and valued in order to industrial use of bentonite. All bentonite deposits, that have been studied in this notet are very wide and very interesting in order to quality of bentonite.