File:Greenstone belt cross-section EN.svg

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Captions

Captions

Schematic cross-section through an Archaean greenstone belt in the Yilgarn craton

Summary

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Description
English: Map of the Yilgarn craton in southwest Australia, showing the location of greenstone belts (supracrustals). Below a schematic cross-section through a greenstone belt, showing the shape and commonly occuring rock type sequence in greenstones. Greenstone belts occur as infolded synformal troughs in granulite gneiss terranes. An ideal greenstone sequence is (from bottom to top): ultramafic volcanic rock (komatiite), mafic volcanic rock (basalt), andesitic to felsic volcanic rocks, and metasediments on top. The entire sequence is cut through by (slightly younger) granitoid plutons.

The cross-section is by no means a realistic representation of geological structures at the location on the map. Rather, it shows the general nature of a greenstone belt.

The map of the Yilgarn Craton is based on this file.
Date
Source Own work
Author Woudloper

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current06:52, 27 July 2024Thumbnail for version as of 06:52, 27 July 2024661 × 1,209 (308 KB)Woudloper (talk | contribs)Uploaded own work with UploadWizard

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