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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 41 (1971)No. 4. (December), Pages 1136-1137

Desert Glaze: NOTES

E. P. Fisk

ABSTRACT

A heretofore undefined geologic phenomenon recently was observed in the middle of the great Sahara of North Africa. Rarely the upper surfaces of certain dense, siliceous pebbles exhibited a thin, colorless, transparent, highly lustrous coating herein given the name "desert glaze." In petrographic thin sections the glaze ranged up to 0.01 mm in thickness. Desert glaze is believed to be derived from its host rock by the action of dew repeatedly dissolving minute quantities of silica and depositing them upon evaporation.


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