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“ Classic ” plate tectonic settings and mountain building. Divergent boundary – fault-block mountains (horsts and grabens). Steens Mountain, Oregon. “ Classic ” plate tectonic settings and mountain building. Divergent boundary – fault-block mountains (horsts and grabens)

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“ Classic ” plate tectonic settings and mountain building


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    1. “Classic” plate tectonic settings and mountain building • Divergent boundary – fault-block mountains (horsts and grabens)

    2. Steens Mountain, Oregon

    3. “Classic” plate tectonic settings and mountain building • Divergent boundary – fault-block mountains (horsts and grabens) • Collision (convergent) boundary – “fold-and-thrust” belts

    4. Development of a fold and thrust belt mountain range Note the asymmetry as one part of the fold overrides the other part. The low-angle reverse fault is called a thrust fault.

    5. Wyoming foreland – Rockies

    6. “Classic” plate tectonic settings and mountain building • Divergent boundary – fault-block mountains (horsts and grabens) • Collision (convergent) boundary – “fold-and-thrust” belts • Subduction (convergent) boundary – volcanic arc mountains

    7. Cascades volcanic arc

    8. “Classic” plate tectonic settings and mountain building • Divergent boundary – fault-block mountains (horsts and grabens) • Collision (convergent) boundary – “fold-and-thrust” belts • Subduction (convergent) boundary – volcanic arc mountains • Transform boundaries are not associated with mountain-building

    9. Origin of the Transverse Ranges “Transpressional”

    10. Origin of the Sierra Nevada Relict subduction zone