Browse Items (4 total)

  • Temporal Coverage is exactly "Older Precambrian"

http://dl.dropbox.com/u/66399955/GC-1.JPG
Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-1A.JPG
Both cross polarized and plain polarized images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-2.JPG
Part of the The Granite Gorge Metamorphic Suite, this is usually considered a metavolcanic, and its mineralogy is dominated by quartz and mica.

Both thin section images were taken at a 400x magnification.

http://dl.dropbox.com/u/66399955/GC-3.JPG
This sample is mis-labeled as a pegmatite. It is really a porphyritic dike material that cuts through the Zoroaster Granite. The phenocrysts are hornblende.
Output Formats

atom, dc-rdf, dcmes-xml, json, omeka-xml, rss2