Tuesday, March 27, 2018

Scotland

Last time when I was in Scotland, there were numerous Igneous rocks  that I found wherever volcanic activity has brought, or is bringing, magma, ash etc. to the surface where they form basalt, tufa etc. There are also igneous rocks that form underground, and have become exposed by erosion, eg. granites, intrusive dykes. For example, Edinburgh Castle sits atop an extinct volcano.

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