Origin of Species Variorum

→ Formations rich in fossils of many kinds, and of thickness sufficient 1869 1872

In our archipelago, I believe that fossiliferous formations could be formed of sufficient thickness 1859

I believe that fossiliferous formations could be formed in the archipelago, of thickness sufficient 1860

As the common rule formations rich in fossils would be formed in the archipelago, of thickness sufficient 1861

Formations rich in fossils, and of thickness sufficient 1866

→ would generally be formed in the archipelago only 1866 1869 1872

only 1859 1860 1861

→ of time, during 1866 1869 1872

during 1859 1860 1861

→ on the steeper shores would 1861 1866 1869 1872

would 1859 1860

→ America; even throughout the extensive and shallow seas within the archipelago sedimentary beds could hardly be accumulated of great thickness during the periods of elevation, or become capped and protected by subsequent deposits, so as to have a good chance of enduring to a very distant future. 1869

America. 1859 1860 1872

America; even throughout the extensive and shallow seas within the archipelago sedimentary beds could not, during the periods of elevation, be accumulated of great thickness, or become capped and protected by subsequent deposits, so as to have a good chance of enduring to an extremely distant future. 1861 1866

↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872

Even throughout the extensive and shallow seas within the archipelago, sedimentary beds could hardly be accumulated of great thickness during the periods of elevation, or become capped and protected by subsequent deposits, so as to have a good chance of enduring to a very distant future.

→ new and distinct 1869

distinct 1859 1860 1861 1866

new, though closely allied 1872

on the bed of the sea, or where it did not accumulate at a sufficient rate to protect organic bodies from decay, no remains could be preserved.

→Formations rich in fossils of many kinds, and of thickness sufficient to last to an

age,

age

as distant in futurity as the secondary formations lie in the past, →would generally be formed in the archipelago only during periods of subsidence. These periods of subsidence would be separated from each other by

enormous

immense

intervals,

intervals

→of time, during which the area would be either stationary or rising; whilst rising,

each

the

fossiliferous

formation

formations

→on the steeper shores would be destroyed, almost as soon as accumulated, by the incessant coast-action, as we now see on the shores of South →America; even throughout the extensive and shallow seas within the archipelago sedimentary beds could hardly be accumulated of great thickness during the periods of elevation, or become capped and protected by subsequent deposits, so as to have a good chance of enduring to a very distant future. ↑ During the periods of

subsidence

subsidence,

there would probably be much extinction of life; during the periods of elevation, there would be much variation, but the geological record would then be

less

least

perfect.

It may be doubted whether the duration of any one great period of subsidence over the whole or part of the archipelago, together with a contemporaneous accumulation of sediment, would

exceed

exceed

the average duration of the same specific forms; and these contingencies are indispensable for the preservation of all the transitional gradations between any two or more species. If such gradations were not

fully

all fully

preserved, transitional varieties would merely appear as so many →new and distinct species. It

is,

also,

also

probable that each great period of subsidence would be interrupted by oscillations