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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Sajan sarthak
1.the top of the diagram shows that granite, diorite, gabbro peridotite are coarse grained rocks means they are plutonic in nature. 2. just below the diagram there are showing Rhyolite,andesite , basalt ,komatitite. they are fine grained in nature so they are volcanic to intermediate. 3. From the top and bottom we can know that granite-Rhyolite ,diorite- andesite gabbro- basalt peridotite-komatiite that are plutonic and their volcanic equivalents respectively. 4.then comes the percentage part of the minerals sillicic means greater than 45 percent quartz , totally rich in Na plagioclase,and 68to 90 Percent biootite and potassium feldspar 50 percent .\ and rest you can interpret in same manner. 5. K Na increases as rock becomes ultarmafic to felsic/sillicic and ca,Fe and Mg increases from sillicic to ultarmafic. and sillica percentage increases from ultarmafic to sillicic.
point no 4 ... plz explain it again