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Journal of researches into the natural history and geology of the countries visited during the voyage of H.M.S. "Beagle" round the world, under the command of Capt. Fitz Roy, R.N.
AA, Outer edges of the fringing—reef, at the level of the sea. BB, The shores of the fringed island. A'A', Outer edges of the reef, after its upward growth during a period of subsidence, now converted into a barrier, with islets on it. B'B', The shores of the now encircled islands. CC, Lagoon—channel. NB.—In this and the following woodcut, the subsidence of the land could be represented only by an apparent rise in the level of the sea. —
AA, Outer edges of the fringing—reef, at the level of the sea. BB,
The shores of the fringed island. A'A', Outer edges of the reef,
after its upward growth during a period of subsidence, now
converted into a barrier, with islets on it. B'B', The shores of
the now encircled islands. CC, Lagoon—channel. NB.—In this and
the following woodcut, the subsidence of the land could be represented only by
an apparent rise in the level of the sea.