2006-08-07 04:16:16 · 5 answers · asked by erin h 1 in Science & Mathematics ➔ Earth Sciences & Geology
The Appalachian Mountains were formed during the Appalachian Orogeny (mountain building). This was when Gondwanaland (African and Europe) collided with North America about 350 million years ago.
Basically the collision lifted the ground and pushed it upward causing the mountain chain to form.
I'm unsure about the Cascade range...I believe that the cascades were formed during a plate collision in the Cretaceous period.
I hope this helps.
2006-08-07 04:38:42 · answer #1 · answered by Anonymous · 3⤊ 0⤋
The Cascade Mountians were formed by three main forces, volcanos such as; Mt. Baker, Glacier Peak, Mt. Rainer, Mt. St. Helen, and Mt. Adams. Second force that shaped this region is uplifting and folding due to plate tectonics, and of course glaciers played a big part in this.
2006-08-07 13:33:54 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Interesting homework question, isn't it? Two different mountain systems at opposite ends of the continent.
Eqmidnite and Caro_G are both essentially correct. But the real answers are far more complex than will fit in Yahoo answers.
I'll bet you will find the answers in your book. Read a little more.
2006-08-07 18:18:22 · answer #3 · answered by Tom-PG 4 · 0⤊ 1⤋
the magical mountain fairy was bored one night so she made them
2006-08-07 11:22:31 · answer #4 · answered by haat 5 · 0⤊ 0⤋
sorry
2006-08-07 12:34:34 · answer #5 · answered by sithara 1 · 0⤊ 0⤋