Talk:Rollstone Boulder

Latest comment: 11 years ago by 68.107.134.74 in topic Porphyritic granite

Porphyritic granite

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If it's a porphyritic granite, that information came from somewhere, and there should be a source that probably also describes the phenocrysts. Can you add the source and a description? --68.107.134.74 (talk) 02:46, 4 January 2013 (UTC)Reply