in
Vetch,*** which pass gradually into a compact limestone, differ only in
colour from the Guadaloupe stone; and agree with it, and with the
calcareous breccia of Dirk Hartog's Island, in the gradual melting down
of the cement into the included portions, which is one of the most
remarkable features of that rock.**** A calcareous compound, apparently
of the same kind, has been recently mentioned, as of daily production in
Anastasia Island, on the coast of East Florida;***** and will probably be
found to be of very general occurrence in that quarter of the globe. And
Captain Beaufort's account of the process by which the gravelly beach is
cemented into stone, at Selinti, and several other places on the coast of
Karamania, on the north-east of the Mediterranean,****** accords with M.
Peron's description of the progress from the loose and moveable sands of
the dunes to solid masses of rock.******* In the island of Rhodes, also,
there are hills of pudding-stone, of the same character, considerably
elevated above the sea. And Captain W.H. Smyth, the author of Travels in
Sicily, and of the Survey of the Mediterranean recently published by the
Admiralty, informs me, that he has seen these concretions in Calabria,
and on the coasts of the Adriatic; but still more remarkably in the
narrow strip of recent land (called the Placca) which connects Leucadia,
one of the Ionian Islands, with the continent, and so much resembles a
work of art, that it has been considered as a Roman fabric. The stone
composing this isthmus is so compact, that the best mill-stones in the
Ionian Islands are made from it; but it is in fact nothing more than
gravel and sand cemented by calcareous matter, the accretion of which is
supposed to be rapidly advancing at the present day.

(*Footnote. Geological Transactions volume 5 page 479.)

(**Footnote. Linnean Transactions 12 page 53 to 57.)

(***Footnote. Geological Transactions 2nd Series volume 1 page 172.)

(****Footnote. Koenig Philosophical Transactions 1814 page 107 etc.)

(*****Footnote. Bulletin des Sciences Nat. Mars 1825.)

(******Footnote. Beaufort's Description of the South Coast of Asia Minor
etc. Second edition. London 1818: pages 180 to 184 etc. In the
neighbourhood of Adalia the deposition of calcareous matter from the
water is so copious that an old watercourse had actually crept upwards to
a height of nearly three feet; and the rapidity of the deposition was
such that some specimens wer