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You are browsing the archive for 2011 March 09.

9 March 2011

A portrait of the feldspar as a young mineral

A few microscope photos for you, showing close-ups of feldspars in igneous dikes in the Crazy Mountains of Montana… You’ve seen these rocks before, when I posted a few field photos from this area in August 2009. I took these images of feldspar phenocrysts in a hand sample (from a quartz latite dike) with my no-longer-brand-new Nikon microscope camera: There’s some nice compositional zoning going on in some of these …

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