This province is the largest, covering about 585,000 miles and extending from western New York to North Dakota, and south to Texas. The Cascades form an arc-shaped band extending from British Columbia to Northern California with 13 major volcanic centers that lie in sequence.

The Sierra Nevada mountains can be thought of as an enormous tilted fault block with a long slope westward to California's Central Valley and steep eastern slope.

These two mountain ranges formed by different geological forces and processes. Article 4: Cascade-Sierra Mountains Province.Mitchel at 6,684 feet), as well as 50 other peaks over 6,000 feet. Within the province is the highest peak east of the Mississippi River (Mt. The province is made up of ridges, rolling hills, and mountains of the Appalachian Mountain Belt. The Blue Ridge province stretches over 550 miles from southern Pennsylvania to northeastern Georgia. The combination of the arid climate and the tensional stress applied to the crust over the past 30 million years formed the horst and graben topography found in this province today. This pattern extends from eastern California to central Utah, and from southern Idaho into the state of Sonora in Mexico.

The Basin and Range province has a distinct topography characterized by alternating steep elongate mountain ranges and flat, dry deserts. The birth of the mountain ranges in this region, some 480 million years ago, marks the first of several mountain building plate collisions that culminated in the construction of the supercontinent Pangea with the Appalachians near the center. Stretching from New York to Alabama, the Appalachian Plateaus show evidence of deformation by plate collision. Article 1: Appalachian Plateaus Province.

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