Definitions for "Catastrophism"
The doctrine that the geological changes in the earth's crust have been caused by the sudden action of violent physical causes; -- opposed to the doctrine of uniformism.
The belief that geologic history consists of major catastrophic events involving processes that were far more intense than any we observe now. Contrast with uniformitarianism.
Once-popular belief that events in earth history had occurred in the past a sudden events and by processes unlike those operating today.
"Catastrophism was an eighteenth- and nineteenth-century attempt to reconcile some form of creationism with the uncomfortable facts of the fossil record." [See Chapter 9 of The Blind Watchmaker.
Explaining past change in terms of discontinuous, catastrophic processes.