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Comparatively, plutonism within uniformitarianism is equivalent to neptunism within catastrophism, as both are used as core concepts within their respective theories, and hence similarly, neptunism opposes plutonism in the same way that catastrophism opposes uniformitarianism. Plutonism versus Neptunism at the southern tip of - GeoScienceWorld Updates? They accepted "that mountains, slopes, and different highlights were as old as the Earth itself, and were changed just when water sloshed over them during times of worldwide flooding" (65). EAR 105 Exam 2 Flashcards | Quizlet [5] This contradicted Neptunism, as it believes granites to be precipitated out of the ocean, hence being the oldest rock type. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Question 2: Vulcanist vs. Neptunist | Deep Time The Earths crust is mainly basalt rock. also, falling ocean levels. Dykes are discordant intrusions, while sills are concordant intrusions. Discoveries - James Hutton - Science Hall of Fame - National Library of The Neptunists, led by Werner and his students, maintained that Earth was originally covered by a turbid ocean. [4] Neptunists believed that the Earth's surface initially only contained a turbid ocean, which led to deposits of sediments on the ocean resulting in the formation of crystalline rocks such as granites. Werner rejected uniformitarianism (belief that geological evolution has been a uniform and continuous process). published in 1788, which used the Glen Tilt of Perthshire as the prime example supporting his theory; an example used by Neptunism to prove their theory as well.