2. You're studying a medium- to coarse-grained (4-10 mm) igneous rock. Based on the hand sample, you estimate that the rock contains 30% alkali feldspar, 30% nephaline, 15% hornblende, 15% plagioclase, and 10% biotite. Accessory minerals are negligible. What is the rock name? ____________________________
Please read over the questions carefully and answer the questions and label the corresponding diagram (attached image 1). (I have also added a closer up image of the bottom left diagram (image 2).
Show your calculations and plot each rock on the appropriate blank classification diagram on the back of this page. Label your plotted points with the corresponding question number and label the corners of the diagram.
2. You're studying a medium- to coarse-grained (4-10 mm) igneous rock. Based on the hand sample, you estimate that the rock contains 30% alkali feldspar, 30% nephaline, 15% hornblende, 15% plagioclase, and 10% biotite. Accessory minerals are negligible.
What is the rock name? ____________________________
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