4310LM2K_S10Tue

4310LM2K_S10Tue - GLY 4310 50 points Name Tuesday, April 6,...

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1 GLY 4310 Name 50 points Tuesday, April 6, 2010 LAB MIDTERM 2 Closed Notes - 15 points True-False - Print the letter T or F in the blank to indicate if each of the following statements is true or false. Illegible answers are wrong. (1 point each) 1 F 1. The mafics associated with granite are olivine or pyroxene. 0 T 2. Gabbro is a medium to coarse-grained rock consisting of mid- to calcic plagioclase and clinopyroxene. 2 T 3. The major felsic mineral in ijolite is nepheline. 5 T 4. Biotite is lower in Bowen’s Reaction Series than hornblende. 0 T 5. Trachytes commonly exhibit flow texture, including flow-banding or alignment of phenocrysts. Multiple-Choice - Choose the best response to each statement or question. Print the letter corresponding to your choice in the blank. (1 point each) 4 D 1. Kaolinization is an alteration process from which of the following minerals to which mineral? A. Clay; Epidote B. Pyroxene; Amphibole C. Olivine; Serpentine D. Feldspar; Clay 1 C 2.The essential felsic mineral in andesite is: A. K-feldspar B. Quartz C. Plagioclase D. Nepheline
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2 2 A 3. If M > 90 and hb/(hb+px+ol) > 90%, the rock is called:
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4310LM2K_S10Tue - GLY 4310 50 points Name Tuesday, April 6,...

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