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notes petrography

by: Valeska Guzmán

notes petrography GEOL 3372

Valeska Guzmán
GPA 3.1

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About this Document

one week notes
Peter Copeland
Class Notes
petrography geol3372
25 ?




Popular in Petrography

Popular in Natural Sciences

This 1 page Class Notes was uploaded by Valeska Guzmán on Sunday January 31, 2016. The Class Notes belongs to GEOL 3372 at University of Houston taught by Peter Copeland in Spring 2016. Since its upload, it has received 29 views. For similar materials see Petrography in Natural Sciences at University of Houston.


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Date Created: 01/31/16
Calcite: difference between velocities depends on thickness Distance light travels at an angle increases thickness light is refracted in calcite. Better with ticker piece of calcite distance is more the ticker It is. Calcite is cheap refractive different in calcites biggest birefringence Birefringence depends on light and what colors you see wavelength changes =change in color Not always maximum interference color difference in velocity depends on orientation. Time it takes to go through thin section is related to velocity. Not all same color due to orientation. Pollycrystallisation=no glass Sphere traveling of light in garnet. Surface depends on relative velocities. Light is continuously changing because of internal structure of minerals. Biaxial 3 different velocities, Uniaxial c axis is always same different in biaxial diagnostic fracture angle between 2 axis. Uniaxial positive or negative find interference looking down optic axis when rotate 360. Makes light travel in different planes 2 rays depend on when angle minerals change light depends on the orientation. Igneous and metamorphic equilibrium assemblages basalt—plagioclase 2v vary a lot.


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