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145-Granite Gneiss, and Granite $9.00
Mystery includes rock, fossil, or mineral sample and Mystery questions with teaching instructions.


-- A piece of granite that is coarse-grained enough to show feldspar, quartz and dark minerals such as mica or amphibole
-- A piece of granite gneiss clearly showing banding of dark minerals such as mica or amphibole

- To introduce metamorphic rocks, specifically granite gneiss
- To show the parallel alignment of dark minerals and provide an opportunity to discuss mineralization under pressure
- To open a discussion about processes that happened during the geologic history of an area including: 1) the origin of granite; 2) what could cause subsequent metamorphism; 3) how the resulting rock gets up to the surface where it can be observed

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Ruth Deike
Rock Detective Geoscience Education
395 Deer Run Drive
Nellysford , VA 96080

Phone: 434-263-3737



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