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Rhyolite: volcanic landscape
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Rhyolite: volcanic landscape. Cambellton. Val d’Amour Formation. Collector: R. Miller, 2004. New Brunswick Museum (NBMR 1803). Image width 17 cm. Rhyolite is an extrusive volcanic rock. It is the chemical equivalent of granite, magma that erupts at the surface rather than cooling slowly below the surface. Rhyloite from this locality has been radiometrically dated at 407.4 +/- 0.8 million years old.
