Volcanic Basalt Formations #1 is a photograph by Royal Institution Of Great Britain which was uploaded on August 4th, 2016.
Volcanic Basalt Formations #1
Volcanic basalt formation. 18th-century illustration of visitors viewing and measuring several spherical formations embedded in basalt columns in the... more
Title
Volcanic Basalt Formations #1
Artist
Royal Institution Of Great Britain
Medium
Photograph
Description
Volcanic basalt formation. 18th-century illustration of visitors viewing and measuring several spherical formations embedded in basalt columns in the volcanic mountains of the Ardennes, near Pradelle, France. These structures (extrusive igneous rocks) form when molten rock (magma) from below the Earth's surface rises to the surface during volcanic activity. The geometry of the formations is due to contraction on cooling. Artwork from 'Mineralogie des volcans' (1784) by French geologist Barthelemy Faujas de Saint-Fond (1741-1819).
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August 4th, 2016
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