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(Article of periodic en Anglais - 1988)

Document title

A note on the characteristics and possible origins of desert varnishes from southeast Morocco

Authors(s) and Affiliation(s)

SMITH B. J. ; WHALLEY W. B. ;

Abstract

Identification of two substrate - controlled varnish types : a patchy varnish interspersed with " silica glaze " on silicified limestone and a complete varnish cover on partially - silicified limestone. Electron probe microanalysis and scanning electron microscopy were used in conjunction to investigate their chemical composition. In both instances, varnishes are predominantly silica and iron-rich with localized concentrations of manganese. Inorganic fixation of iron and manganese is the preferred explanation, with manganese and iron derived from external sources, possibly wind-blown dust

Source

Article of periodic

published at : Earth surface processes and landforms

Editor :

Millesime : 1988, vol. 13, no3 [pp. 251-258]

Bibliographic references : 18 réf.

Language

Anglais

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