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Andrew Alden

Provenance Diagrams

By January 26, 2013

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qmflt diagramI've constructed versions of the widely used QFL and QmFLt provenance diagrams for your use and edification. These are tools that translate the blend of minerals in a given sandstone into a particular kind of terrane, or geological homeland, that eroded to form that blend. The concept seems simple when you spell it out in words (as I do in my new article "Rock Provenance by Petrographic Methods"), but to turn an idea into a diagrammatic tool the authors gathered hundreds of detailed analyses of North American sandstonesand boiled the data down to the clean result shown in my Sedimentary Rock Classification Diagrams collection.
QmFLt diagram — Geology Guide image

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