They're on the north American plate.
The pacific plate and the cocos plate
No, the Andes are near a subduction zone type plate edge but the Appalachian Mountains are not near any plate edge of any kind.
Appalachian Mountains
I'm not too sure but i think it is the convergent plate boundary
No. There is no such thing as a passive plate edge. They are near a passive continental margin.
The remains of the mountains exposed are marine sedimentary rocks, oceanic basalt, even coal.
the Atlantic plate sliding under the north American plate over 300 million years ago
Appalachian Mountains.
The Appalachian mountains.
Appalachian
No, the Appalachian Mountains are further East. :)
The Appalachian Mountains run through Maine and Georgia.