2.13 Rocky Mountains, Formation of the Southern Rockies: Still an Enigma being Debated by Geologists The portion of the Rocky Mountains that extends from Southern Montana to New Mexico was produced by a period of deformation known as the Laramide …

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2.12 Earthquakes in the Pacific Northwest: the Cascadia Subduction Zone and Juan de Fuca Plate Seismic studies have shown that the Cascadia subduction zone exhibits less earthquake activity than any other subduction zone along the margin of the Pacific basin. …

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