When we are unable to explain the monuments of past changes, it is always more probable that the difference arises from our ignorance of all the existing agents, or all their possible effects in an indefinite lapse of time, than that some cause was formerly in operation which has ceased to act...


Principles of Geology (Volume 1), Chapter IX (pp. 164-165)


When we are unable to explain the monuments of past changes, it is always more probable that the difference arises from our ignorance of all the...

When we are unable to explain the monuments of past changes, it is always more probable that the difference arises from our ignorance of all the...

When we are unable to explain the monuments of past changes, it is always more probable that the difference arises from our ignorance of all the...

When we are unable to explain the monuments of past changes, it is always more probable that the difference arises from our ignorance of all the...