Browse Items (1651 total)

Macroscopic: Mesocratic fibrolitic double micaceous pinstripped gneiss. High reflectivity denotes a high concentration of foliated micas. Migmatized texture indicates of the rock indicates incipient melting. Microscopic: This sample contains…

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Contains secondary products of alteration including serpentine, talc, chlorite, carbonates, and iron oxides

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Na-clinopyroxene (chloromelanite), almandine garnet, rutile, glaucophanic amphibole, harrisitic hornblende, epidote, ablite, chlorIte. Chloromelanite pseudomorphs on primary pyroxenes and chloromelanitic aggregates in plagioclase; granoblastic…

(exotic block)

Porphyritic texture with large (>0.5 cm) euhedral garnets in a fine grained, green matrix shows serpentinization, one side containing mass of light colored transloucent pyroxcene; contains pyroxcene, plagioclase, olivine.

Thin Section.
Large…

Grossular-andradite garnet, diopside, chlorite, sodic pyroxene, vesuvianite, titansphene, opaques. Traces of primitive gabbroid structure with diablastic development of the newlyformed phases and pseudomorphs of sodic pyroxene on primary pyroxenes.…

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