Close-up of the patterns and structural detail in a polished slab of dendritic rhyolite; an igneous rock from Mexico known for...

Sonoran Dendritic Rhyolite-1

Mexico

Close-up of the patterns and structural detail in a polished slab of dendritic rhyolite; an igneous rock from Mexico known for its feather-like dendritic patterns.

Image #4429. Photo © copyright by Mark Windom.

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