4200LFOTK_F10

4200LFOTK_F10 - GLY 4200C 36 points Name December 2, 2010...

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1 GLY 4200C Name 36 points December 2, 2010 LAB FINAL EXAMINATION Open Notes Determine if each of the following grains is isotropic or anisotropic. (2 points) 1 1. Anisotropic 3 2. Isotropic Estimate the relief (in words and numerically) of each of the following grains. (8 points) 16.5 3. Low moderate n . 1.62 13 4. High n . 1.70 Indicate what technique was used to determine the relief, explain how you used the technique, and show calculations. 3 Becke line * 4 Becke line In Line moves in as * Grain outline clearly visible with iris half stage is lowered * closed Many students appeared to have * completely forgotten the Becke * and Oblique Illuminations tests * * * * | Name the type of twinning seen in each crystal. (3 points) 0 5. Albite 0 6. Gridiron 1 7. Carlsbad Name the feature seen in this crystal (zoning, ex-solution) (2 points) 0 8. Zoning
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2 Describe the cleavage or fracture (2 points) 9 9. Fair cleavage in 1D Description involves quality, number of directions, and angle Determine the interference color (color and order) of the grain under the cross-hair. (6 points)
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This note was uploaded on 12/13/2010 for the course GLY 4200c taught by Professor Warburton during the Spring '10 term at FAU.

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4200LFOTK_F10 - GLY 4200C 36 points Name December 2, 2010...

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