A Geoscience Digital Image Library

TitleAmygdaloidal Basalt, Mohawk Mine, Ahmeek, Keweenaw County, Michigan
DescriptionHere we see a purplish, compact rock with innumerable amygdules of varying size filled largely with quartz, epidote, calcite, and chlorite. This basalt has been strongly altered, and now contains much chlorite and hematite. The amygdules (gas bubbles originally) are filled with epidote, quartz, chlorite, zeolites and some calcite. This sample is 9.5 cm across.
LocationUSA ▹ Michigan ▹ Keweenaw. Near Houghton. Mohawk Mine.
PhotographerMike Davis. 2001-02-22.
CollectionWard’s Collection of Classic North American Rocks #35.
Key wordsamygdaloidal basalt, basalt, Michigan
Tech details590 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number139