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Tectonic Development of the Appalachian—Ouachita—Marathon Mountain Range (2 of 3)

map of the world showing location of continents 250 million years ago

250 Million Years Ago—Iapetus Ocean Closes. Pangea forms as the continents collide. The Appalachians are part of a larger zone of continental collision that includes the Marathon and Ouachita mountains in the southern United States, the Atlas Mountains in Africa, and the Caledonide Mountains in Greenland, the British Isles, and Scandinavia.

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Modified from “Parks and Plates: The Geology of our National Parks, Monuments and Seashores,” by Robert J. Lillie, New York, W. W. Norton and Company, 298 pp., 2005, www.amazon.com/dp/0134905172.

Public domain:Full Granting Rights

Image

Geologic Resources Division, Code: GRD

NPS.gov Collection

11/22/2019

11/22/2019

Monday, February 3, 2020 10:17:12 AM

Monday, February 3, 2020 10:17:12 AM

iapetus closes@10x.jpg

Friday, November 22, 2019 5:32:28 PM

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422.6 kB

2019-11-22T10:32:28-07:00

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