micROCKScopica - Ocean Jasper
by Bernardo Cesare, Department of Geosciences, University of Padova, Padova, Italy
Polarized light photomicrograph of a thin section of Ocean Jasper.
Ocean Jasper is an orbicular silicified rhyolite (volcanic rock) from Madagascar. The photomicrograph is a close-up of impinging spherulitic orbs showing their radiating texture of fibrous chalcedony their opaque-rich cores. Just a 4 mm across.
Taken on 22
Submitted on 21 February 2014
- European Geosciences Union (271)
- Geochemistry, Mineralogy, Petrology & Volcanology (787)
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Credit: Bernardo Cesare (distributed via imaggeo.egu.eu)
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