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Geophysical global cooling
Before the concept of plate tectonics, global cooling was a reference to a geophysical theory by James Dwight Dana, also referred to as the "contracting earth" theory. It suggested that the Earth had been in a molten state, and features such as mountains formed as it cooled and shrank. As the interior of the Earth cooled and shrank, the rigid crust would have to shrink and crumple. The crumpling could produce features such as mountain ranges.
Additional recommended knowledge
Some of the objections include:
This theory is now disproven and considered obsolete. In contrast to Earth, however, global cooling remains the dominant explanation for scarp (cliff) features on the planet Mercury.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Geophysical_global_cooling". A list of authors is available in Wikipedia.|