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A Cretaceous laterite in the Negev Desert, southern Israel

Published online by Cambridge University Press:  01 May 2009

A. Singer
A. Singer
Affiliation:
Department of Soil and Water ScienceThe Hebrew University of JerusalemFaculty of Agriculture, RehovotIsrael
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Summary

Kaolinite is the major mineral in the saprolite of a fossil laterite, found intercalated amid basalt flows from the Lower Cretaceous in the Negev desert. The kaolinite was produced by pseudomorphic alteration of plagioclase. Haematite is a secondary product and accumulated in a ferruginous soil horizon. In the saprolite Sr, Mn and Cu were strongly depleted, Zn and Ni were slightly depleted, whereas Co and Cr accumulated. In the ferruginous horizon, Sr, Mn, Cu and Zn were severely depleted, while Cr and Ni accumulated. The lateritic formation is evidence for the possible existence of tropical or intertropical conditions during the Lower Cretaceous in the Negev.

Type
Articles
Information
Geological Magazine , Volume 112 , Issue 2 , March 1975 , pp. 151 - 162
Copyright
Copyright © Cambridge University Press 1975

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