“ classic ” plate tectonic settings and mountain building
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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) - PowerPoint PPT PresentationTRANSCRIPT
“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)
• Collision (convergent) boundary – “fold-and-thrust” belts
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.
Wyoming foreland – Rockies
“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
Cascades volcanic arc
“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
Origin of the Transverse Ranges
“Transpressional”
Origin of the Sierra Nevada
Relict subduction zone