Volcanics

Some images of complex zoning in quartz from silicified volcanic rocks in west Texas that I consider particularly nice. Some of the light blue luminescence is due to fluorite. Sample courtesy of J. Rubin and J. Price.

Image 1 (Color, 129 Kb)

Image 2 (Color, 527 Kb)

Image 3 (Color, 402 Kb)

Zoned plagioclase feldspar from a basalt.

Apatite from carbonatite, Oka, Quebec. (gray-scale, 109 Kb)

A production of:
Robert M. Reed
Bureau of Economic Geology
University of Texas at Austin