Abstract

A Devonian laterite has recently been discovered near Reshun in the Mastuj valley of Chitral State, West Pakistan. It is believed to be the fourth recorded Paleozoic laterite in the world. The laterite is entirely within a thick carbonate of the Shogram Formation of Upper Devonian (Frasnian) age.A chemical analysis of the laterite shows the principal constitutents to be: Al 2 O 3 35.5%, SiO 2 21.7% Fe 2 O 3 16.0%, FeO 10.3%, TiO 2 3.5% CaO 0.97%, and MgO 0.70%.Minerals determined by X-ray analysis include hematite, boehmite, diaspore, anatase, rutile, kaolinite, pyrophyllite and what is probably chamosite.

First Page Preview

First page PDF preview
You do not currently have access to this article.