Crossword-Solution: VULCANICITY 11 letters, 1 clue 🏆 scrabble score: 21

Judd, F.R.S., in his able work entitled, _Volcanoes: What they are, and what they teach_,[11] has furnished the student of vulcanicity with a very complete manual of a general character on the subject.

Some of the earlier writers of modern times on the subject of vulcanicity--such as Sir Humphrey Davy and Leopold von Buch--maintained that the conical form was due to upheaval by a force acting from below at a central focus, whereby the materials of which the mountain is formed were forced to assume a _quâ-quâ versal_ position--that is, a position in which the materials dip away from the central focus in every direction.

The far greater effects of lunar vulcanicity, as compared with those of our globe, may be accounted for to some extent by the consideration that the force of gravity on the surface of the moon is only one-sixth of that on the surface of the earth.

But there is no good evidence for an excess of carbon dioxide in the atmosphere--an assumption founded on the luxuriance of the vegetation, coupled with the fact that vulcanicity was active and wide-ranging.

Whatever may have been the manifestations of Vulcanicity at former and far remoter epochs of our planet, and to which I shall return, in the existing state of regimen of and upon our globe it shows itself chiefly in the phenomena of Volcanoes and of Earthquakes, which are the subjects of Vulcanology and of Seismology respectively, and in principal part, also, of this Introduction.