Abstract
During the course of geological mapping of the Karewa sediments of Kashmir to assess the economic potentialities of diatomaceous earth, the author collected nearly one thousand samples from 32 measured sections. The samples were analysed for fossil diatoms.
 The study has indicated that while the lower Karewa is very rich in fossil diatoms, the upper Karewa is devoid of them. It is further observed that there is a uniformity in the trend of distribution and assemblages of fossil diatoms in the lower Karewa beds. Based on these two factors, the lower Karewa is divided into two biozones, the lower - Centrales Assemblage Zone, characterized by the predominance of centric diatoms and the upper – Pennales Assemblage Zone, characterized by the predominance of pennate diatoms.
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