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I.—On Aggregate Deposits, and their Relations to Zones

Published online by Cambridge University Press:  01 May 2009

J. F. Blake
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Extract

Geological time, like all other kinds of time, can only be measured by the succession of events. If the events considered are constant in their recurrence and uniform in their nature, their number will afford the means of measuring the length of time. Thus the oscillations of a given pendulum, the rotation of the earth on its axis, and its revolution round the sun are sufficiently constant and uniform to afford a basis for our seconds, days, and years. Of such uniform and constantly recurring events geology affords no examples by which we could measure the length of geological time.

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 11 , November 1898 , pp. 481 - 488
Copyright
Copyright © Cambridge University Press 1898

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References

1 At the reading of this paper Mr. Lomas instanced also some drifts of dead shells now forming in the Irish Sea, and gave the interesting information that the deposit had been partly phosphatized.