• Specimen Number

  37

• Description

  Half-rounded boulder of coarse grained,  slightly pink, granite. Weakly foliated with large, aligned feldspar phenocrysts, suggesting flow before crystallization.

• Classification

  Igneous. Plutonic. Granitic. Granite. Pink.

• Location & Occurrence

  Search suggests source is Permian intrusions in southwest such as the Westerly and Narragansett Pier Granites  (~276 +/- 7 Ma UPb). The older Proterozoic granites are highly sheared, and many recrystallized.

• Geologic Age

  Permian (?)

• Geoheritage

  Magmas indicate culmination of orogenies resulting in Pangea, the large supercontinent. Best candidate is Alleghenian Orogeny.

• Links

  Link to State Geological Map from USGS.  Link to Rhode Island Geological Survey.

• Other

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