Browse Items (5 total)

  • Title is exactly "Amphibolite"

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Rock Sample:
The sample is very dark grey with light grey foliations.
The sample displays thin layering, some areas of chemical weathering, and microfoliations. It is aphanitic. There is quartz- like residue on the outside of the sample. It has…

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Rock Sample: The color is a shiny dark grey with a bluish tint. Some parts of the sample are a more dark turquoise. Some faces are lighter and or darker than other faces. There is also a face with a brownish color and another face with a tannish…

Sample contains porphyroblasts of poikilitic hornblende. Thought to represent Na-rich volcanic units.

cummingtonite-poor, brownish-green hornblende dominated
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