The catastrophism vs. uniformitarianism looks at the differences between these philosophies or opinions. Such include the age of Earth, geologic features formation processes (natural vs. theological backed), and which is the correct methodology in geosciences.
Uniformitarianism will consider slow, observable processes as the reason for the Earth’s landscape appearance. For instance, they feel erosion forming mountain ranges formation over a long time, silt deposition from annual floods forming a delta over millions of years, or slow coral accumulation resulting in a barrier reef.
On the other hand, catastrophists see mountain ranges, valleys, canyons, and other landforms due to short, punctuated, often catastrophic events like glacial action, floods, earthquakes, tsunamis, superstorms, volcanism, etc.
Learn more about catastrophism and uniformitarianism, including their differences and controversies.
Understanding catastrophism and uniformitarianism
We must look at each doctrine or concept shortly to compare and contrast or give you the difference between catastrophism and uniformitarianism.
1. What is catastrophism?
Catastrophism is a doctrine or theory postulated by Baron Georges Cuvier (1769-1832), a French zoologist and naturalist. It states that the biological and physical world was shaped by a series of sudden, short-lived, often widespread, or global violent events (catastrophes) of unknown cause that no longer operated.
These catastrophes sculpted the Earth’s surface (created canyons, valleys, mountains, igneous intrusions, etc.) and caused the extinction and emergence of new living organisms (fauna and flora). The catastrophes were a revolution of nature and included crustal upheaval, earthquakes, glacial movement, and floods, with the final one seen as the ‘last universal inundation.’
William Buckland ( Lyell’s teacher) and Robert Jameson, Professor of Natural History at the University of Edinburgh, used catastrophism to create the notion that the last universal inundation was the Biblical deluge, appealing to many naturalists and theologians. The theory seemed to support the Scriptural account of creation.
2. What is uniformitarianism?
The doctrine or principle of uniformitarianism states that natural laws and processes that operate today operated in the past but not necessarily at the same rate or intensity. Therefore, since these natural forces and geological processes operated throughout history, scientifically observable present processes and analogs can help geologists understand and interpret past structures like ancient rock, i.e., the future is the key to the past.’
James Hutton (1726–1797), a Scottish geologist, farmer, and naturalist, was the first to propose the idea or doctrine of what was later known as uniformitarianism. By observing his native Scottish landscape, he realized slow processes like erosion, weathering, sediment transportation, and deposition in the sea, and uplift later, given time, would form various structures just like catastrophic events.
He saw the Earth as dynamic and cyclic, i.e., continent erosion, sedimentation, and upheaval as a continuous, complete cycle. His ideas implied that the Earth was immensely old. However, they didn’t get much traction.
Later, a Scottish geologist, Charles Lyell (1797-1875), explained and promoted Hutton’s ideas in Principles of Geology (1830-1833). Also, he introduced the concept of uniformity of nature or gradualism, where processes were uniform. In 1832, William Whewell, a University of Cambridge scholar, called this doctrine, theory, or idea uniformitarianism.
Lyell opposed catastrophism and felt it was an attempt to fit Earth’s history in biblical timelines. He also thought it couldn’t explain some geological features, and it was time to take geology as a science away from baseless metaphysical speculation.
This idea of gradualism was later in the 20th century seen as false, stifling, and a blatant lie. It is no longer applied, considering new evidence and advances in other sciences like chemistry, physics, and biology.
Catastrophism vs. uniformitarianism
It is time to compare and contrast, giving you similarities and differences between catastrophism and uniformitarianism. While doing so, we will consider Lyell’s uniformity of nature but not as the ultimate meaning of actualism or modern uniformitarianism.
1. Similarities of uniformitarianism vs catastrophism
The main similarity between catastrophism and uniformitarianism is that they attempted to explain the origin and evolution of the physical and biological Earth and were popular at some point.
Today, these two doctrines are accepted partly to contribute to the evolution of Earth’s landscape and life. There is an agreement that natural laws and processes don’t change and contribute to sculpting Earth while appreciating the role of catastrophes in shaping the Earth, including in causing mass extinctions.
2. How uniformitarianism differ from catastrophism
The main difference between catastrophism and uniformitarianism is that catastrophism holds that sudden, short-lived, violent, disastrous, especially widespread, or global events (catastrophes) sculptured the Earth. In contrast, uniformitarianism considers slow, gradual processes we can observe today, like erosion, sedimentation, land uplift, etc., over a long time to have shaped the Earth.
From the above, we get two differences, i.e., time and main cause that shapes the Earth, i.e., short-lived catastrophic events over a shorter geologic time vs. slow, steady processes that take a very long or endless time, geologically speaking.
The other difference is that uniformitarianism is cyclic, i.e., it involves endless repetition and follows a certain pattern but is not directional, e.g., land uplift or subsidence can happen. However, in catastrophism, events are directional in geologic time and don’t occur in a certain way. Also, catastrophic events no longer exist.
The other difference is that catastrophists tend to lean towards supernatural powers’ role in explaining the cause of catastrophes, including floods. Also, it attempts to fit Earth’s history into timelines consistent with the Bible.
On the other hand, uniformitarianism rules out the role of natural laws and processes and tries to develop geology as a science, eliminating reference to the Bible or supernatural or wild baseless speculation.
Lastly, there is a difference in the interpretation of fossil breaks. Curvier believed that the great paleontological breaks catastrophes that caused mass extinction before new organisms emerged. In contrast, Lyell considered them unconformities, i.e., loss of strata to erosion or some living forms were not well preserved, i.e., geologic record imperfections. Ancestors would be in underlying rocks.
Controversies of these theories
A great catastrophism vs. uniformitarianism debate emerged, rivaling the one between plutonists and neptunists, which ended with uniformitarians’ winners.
The triumph of uniformitarian debate indicated a win of scientific reasoning over special pleading driven by theology. Lyell uniformitarians became founders of the science of stratigraphy and sedimentary.
However, from an actualism view, the triumph was more theological catastrophism than the Cuvier, d’Orbigny, Agassiz, or Brongniart sense of catastrophism.
Modern of these theories
Today, uniformitarianism or actualism, as some geologists and scientists call it, states that 1) natural laws (physical and chemical) and processes operating today operated in the past but not 2) necessarily at the same intensity or rate in space and time and 3) some catastrophic events including those not known to man help in shaping the Earth.
Also, geologists appreciated that some events with no modern analogs may have affected how the Earth behaved. A good example is the non-oxygenated Archean Earth affected erosion and chemical weathering since there were no plants or oxygen, respectively. Others include meteorite impacts, snowball Earths, Glaciation, etc.
References
- Levin, H. L., & King, D. T. (2016). The Earth through time, 11th edition (11th ed.). Wiley.
- MacLeod, N (2005). Stratigraphical Principles. In Selley, R. C., Morrison, C. L. R., & Plimer, I. R. (Eds.). Encyclopedia of geology (Vols. 1-5). Elsevier Academic.
- Kusky, T. M., & Cullen, K. E. (2005). Encyclopedia of earth and space science. Facts on File.
- Wicander, R., & Monroe, J. S. (2010). Historical geology: Evolution of the Earth and life through time (6th ed.). Books-Cole.
- Grotzinger, J. P., & Jordan, T. H. (2014). Understanding earth (7th ed.). W.H. Freeman and Company.
- Prothero, D. R., & Schwab, F. (2014). Sedimentary geology: An introduction to sedimentary rocks and Stratigraphy (3rd ed.). W.H. Freeman and Company.