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The Appalachian Mountains formed through a series of mountain-building events over the last 1.2 billion years: [4] [5] The Grenville orogeny began 1250 million years ago (Ma) and lasted for 270 million years. The Taconic orogeny began 450 Ma and lasted for 10 million years. The Acadian orogeny began 375 Ma and lasted 50 million years.
The following is a list of subranges within the Appalachian Mountains, a mountain range stretching ~2,050 miles from Newfoundland and Labrador, Canada to Alabama, US. The Appalachians, at their initial formation, were a part of the larger Central Pangean Mountains along with the Scottish Highlands , the Ouachita Mountains , and the Anti-Atlas ...
Areas sometimes included when referencing the Appalachian region. Northern section is generally not included. Environmental issues in Appalachia, a cultural region in the Eastern United States, include long term and ongoing environmental impact from human activity, and specific incidents of environmental harm such as environmental disasters related to mining.
The geologic processes that led to the formation of the Appalachian Mountains started 1.1 billion years ago. The first mountain range in the region was created when the continents of Laurentia and Amazonia collided, creating a supercontinent called Rodinia. The collision of these continents caused the rocks to be folded and faulted, creating ...
Visit Mass MoCA, a contemporary art museum, for seminal works by James Turrell and Sol LeWitt, or check out the farmers market and smaller art galleries in the center of town. Section hikers can ...
Blue Mountain in the Lehigh Valley region of eastern Pennsylvania Bald Eagle State Forest in Union County, Pennsylvania. In its northern section, the Great Valley includes the Champlain Valley around Lake Champlain and the upper Richelieu River that drains it into the Saint Lawrence, the Hudson River Valley, Newburgh Valley, and Wallkill Valley, and the Kittatinny Valley, Upper Delaware River ...