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Description
- Abundant phenocrysts in fine-grained matrix offer great demonstration of igneous porphyry
- For use in classroom identification labs and exercises
- Correlates well to Next Generation Science Standards Evidence Statements
- Texture and chemistry variation are useful for students learning about differing cooling rates
- The fine-grained felsic matrix contains larger, identifiable hornblende crystals, indicating two different rates of cooling
- Example of porphyry in igneous rocks
Specifications
Specifications
| Product Type | Igneous Rock, Andesite |
| Quantity | 10/Pk. |
| Specimen Size | 2 to 3 cm |
| Weight (Metric) | 0.2 kg |
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