Gideon Mantell Quote

Volcanic eruptions throw up into daylight the foundations of the fathomless deep below, in the form of ejected or molten masses, or in rivers of ignited and fluid rocks, which congeal on the surface of the ground, either inflated like the scoriae of furnaces, or in solid masses, with no visible impress of heat...

The Wonders of Geology; or, A Familiar Exposition of Geological, Phenomena