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Another Specimen
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Typical Minerals Minerals too small to identify (except phenocrysts). Composition will be from the top of Bowen's Reaction series (i.e. mafic) and we would expect Ca plagioclase, pyroxene, and perhaps some olivine. Note that these minerals are present in this specimen, just too small to see. |
Detail Description
This closeup shows that minerals are too small to see, which is why it is an aphanitic rock. |
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| Last Update: 9/29/00 | e-mail: (Fichtels@jmu.edu) |