Volcanic foci
the subterranean centers of volcanic action; the points beneath volcanoes where the causes producing volcanic phenomena are most active. |
See also: Volcanic
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
the subterranean centers of volcanic action; the points beneath volcanoes where the causes producing volcanic phenomena are most active. |
See also: Volcanic