Illustrations of the Huttonian Theory of the EarthPlayfair, John
Science
Illustrations of the Huttonian Theory of the Earth
Playfair, John
Geology; Hutton, James, 1726-1797. Theory of the earth
130. The system of LAZZARO MORO has been remarked as approaching nearer
to this theory than any other; and it is certain, that one very
important principle is common to them both. The theory of the Italian
geologist was chiefly directed to the explanation of the remains of
marine animals, which are found in mountains far from the sea; and it
appears to have been suggested to him by the phenomena of the _Campi
Phlegræi_, and by the production of the new island of _Santorini_
in the Archipelago. He accordingly supposes, that the islands and
continents have been all raised up, like the above-mentioned island,
from the bottom of the sea, by the force of volcanic fire: that
these fires began to burn under the bottom of the ocean, soon after
the creation of the world, when as yet the ocean covered the whole
earth: that they at first elevated a portion of the land; and in this
primitive land no shells are found, as the original ocean was destitute
of fish. The volcanoes continuing to burn, under the sea, after the
creation of animated nature, the strata that were then raised up by
their action were full of shells and other marine objects; and, from
the violence with which they were elevated, arose the contortions and
inclined position which they frequently possess.[39]
[Footnote 39: Dé Crostacei, et degli altri Marini Corpi, che si trovano
su' Monti: di Ant. Lazzaro Moro. Venezia. 1740.]
This system is imperfect, as it makes no peculiar provision for the
consolidation of the strata, which, according to it, as well as the
Neptunian system, must be ascribed to the action, not of fire, but of
water. No account is given of the mineralization of the shells found
in the strata, or of the difference between them and the shells found
loose at the bottom of the sea; and no distinction is made between
stratified and unstratified substances. But, with all this, Lazzaro
Moro has certainly the merit of having perceived, that some other power
than that which deposited the strata, must have been employed for their
elevation, and that they have endured the action of a disturbing force.
131. From this comparison it appears, that Dr Hutton's theory is
sufficiently distinct, even from the theories which approach to it most
nearly, to merit, in the strictest sense, the appellation of _new_ and
_original_. There are indeed few inventions or discoveries, recorded
in the history of science, to which nearer approaches were not made
before they were fully unfolded. It therefore very well deserves to be
distinguished by a particular name; and, if it behoves us to follow
the analogy observed in the names of the two great systems, which at
present divide the opinions of geologists, we may join Mr Kirwan in
calling this the PLUTONIC SYSTEM. For my own part, I would rather
have it characterized by a less splendid, but juster name, that of the
HUTTONIAN THEORY.
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