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The application also provides a broad theoretical framework which explains how the classification of igneous rocks is made and in which cases can be used Streckeisen diagram.
It also explains briefly how to use the TAS diagram is based on the alkali content of the rock in front of the silica content.
Finally a case study is included, based on the gross value of minerals identified in the rock and how they assimilate to each of the components used to project the values in the diagram.
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