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we may fairly conclude 1859 1860 1861 1866
OMIT 1869 1872

any right 1859 1860 1861
have no reason 1866 1869 1872

the beginning of this world? 1860 1861
eternity? 1859
the beginning of the world. 1866 1869
the beginning of the world. Our continents seem to have been formed by a preponderance, during many oscillations of level, of the force of elevation; but may not the areas of preponderant movement have changed in the lapse of ages? 1872

formations 1859 1860 1861
sedimentary formations in a recognisable condition 1866 1869 1872

extend; for had they
existed,
existed
there,
there,
palæozoic and secondary formations would in all probability have been accumulated from sediment derived from their wear and tear; and
these would
would
have been at least partially upheaved by the oscillations of level, which we may fairly conclude must have intervened during these enormously long periods. If then we may infer anything from these facts, we may infer
that,
that
where our oceans now extend, oceans have extended from the remotest period of which we have any record; and on the other hand, that where continents now exist, large tracts of land have existed, subjected no doubt to great oscillations of level, since the
earliest silurian
Cambrian
earliest Silurian
period. The
colored
coloured
map appended to my volume on Coral Reefs, led me to conclude that the great oceans are still mainly areas of subsidence, the great archipelagoes still areas of oscillations of level, and the continents areas of elevation. But
have
have
we any right to assume that things have thus
existed
remained
from the beginning of this world? Our continents seem to have been formed by a preponderance, during many oscillations of level, of the force of elevation; but may not the areas of preponderant movement have changed in the lapse of ages? At a period
long
immeasurably
antecedent to the
silurian
Cambrian
Silurian
epoch, continents may have existed where oceans are now spread out; and clear and open oceans may have existed where our continents now stand. Nor should we be justified in assuming that if, for instance, the bed of the Pacific Ocean were now converted into a continent, we should there find formations older than the
silurian
Cambrian
Silurian
strata, supposing such to have been formerly deposited; for it might well happen that strata which had subsided some miles nearer to the centre of the earth, and which had been pressed on by an enormous weight of superincumbent water, might have