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A Geoscience Digital Image Library

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TitleDiorite porphyry, Jackson, Wyoming
DescriptionThis sample contains hornblende and plagioclase phenocrysts in a ground mass of plagioclase, biotite and quartz (?). It is 10 cm across.
LocationUSA ▹ Wyoming. Near Jackson.
PhotographerMike Davis. 2001-04-24.
CollectionWard’s Collection of Classic North American Rocks #119.
Key wordsdiorite, porphyry, Wyoming
Tech details954 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number383