Qfl plot software

Tect Self Tests. Since quartz , for all practical purposes, does not weather into anything else, and will remain after everything else is weathered or sorted out, it is one of the most important of the four components of sedimentary rock composition. Pure quartz sandstones are rare. Usually quartz is mixed with one or more of the remaining three components. Pure quartz sandstones form only under great tectonic stability when the land is not high enough for rocks to be exposed to weathering, such as during Wilson Cycle Stage A and Stage I.

Feldspars are some of the most abundant minerals in the earth's crust. With only a few exceptions all igneous rocks have large amounts of feldspar; e. Medium to high grade metamorphic rocks also have large amounts of feldspar. Sediments near high mountains frequently have large percentages of feldspar as batholiths and regional metamorphic rocks are uplifted and eroded Wilson Cycle Stage F and Stage H.

Rift systems Stage B and Stage C frequently also have large amounts of feldspar. Before downloading, please ensure you have read and agree to the conditions of use outlined above. Benn DI. Fabric shape and the interpretation of sedimentary fabric data.

Journal of Sedimentary Research A64 4 : Graphical representation of particle shape using triangular diagrams: an Excel spreadsheet method. Earth Surface Processes and Landforms 25 13 : Pebbles in the lower Colorado River, Texas, a study in particle morphogenesis, Journal of Geology 66 2 : Conditions of use Tri-plot is made available free of charge subject to the condition that the original source Graham and Midgley is referenced in all publications which utilise it.

Downloads Before downloading, please ensure you have read and agree to the conditions of use outlined above. Tri-plot v1. Requires Excel. Requires WinZip or equivalent. References Benn DI.