Photomicrograph, vesicular andesite from andesite flow and flow breccia member. Orange County, California. n. d.
Summary
Album caption:Photomicrograph, vesicular andesite from andesite flow and flow breccia member, sample 12. Augite, plagioclase, and vesicles lined with devitrified glass. The glassy groundmass is solidly charged with magnetite grains. Crossed nicols. X 43. Orange County, California. n. d. Published as figure 63 in U.S. Geological Survey. Professional paper 274-L. 1957.
Summary
Album caption:Photomicrograph, vesicular andesite from andesite flow and flow breccia member, sample 12. Augite, plagioclase, and vesicles lined with devitrified glass. The glassy groundmass is solidly charged with magnetite grains. Crossed nicols. X 43. Orange County, California. n. d.
Published as figure 63 in U.S. Geological Survey. Professional paper 274-L. 1957.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Yerkes, R.F. Collection.
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