{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

KIC004436 - 72x3(Box 2 and TS—7(Box 4 Sample 72x3...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 72x3 (Box 2) and TS—7 (Box 4). Sample 72x3 contains biotite (brown pleochroic). In xpl examine how the mineral goes extinct when its cleavage planes are parallel to the cross hairs of the microscope. In other words it goes extinct when the cleavage planes are parallel to the polarizers. This is called parallel extinction. Now look at sample TS-7 and notice how the clinopyroxene goes extinct when the cleavage planes are at an angle to the cross hairs and polarizers. This is called inclined extinction. Sketch both the clinopyroxene and biotite crystals showing parallel and inclined extinction. 72"3 m “rs-7 “a ohm—t. A etch-1041‘” 06 w.-. . .. mining ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online