Geology of Faults: Normal, Reverse (Thrust), and Strike-Slip Faults, Slides of Earth Sciences

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Teton Mountains produced byTeton Mountains produced by normal faulting.normal faulting. Courtesy of NRCS

Horst and GrabenHorst and Graben

Death Valley Courtesy J. L. Muir, National Park Service

•A graben forms when a block of rock falls between two faults. Huge, relatively flat bottomed valleys, like Death Valley in California

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Reverse Fault (or Thrust Fault)Reverse Fault (or Thrust Fault)

• Hanging wall up relative to footwall.
• Lowangl e fault plane = thrust fault, (fenster, klippen).

Hanging wall

Footwall

Reverse Fault in marble,Reverse Fault in marble, Jazida doJazida do UrubuUrubu, Brazil, Brazil

• Courtesy USGS Digital Data Series DDS2 1

Thrust FaultsThrust Faults

• Thrust faults and associated fold Near Klamath Falls, OR.. Keystone Thrust. Red Rocks State Park, Nevada. This fault, at the leading edge of theSevier Fold Thrust Belt in southern Nevada, places Cambrian BonanzaKing Formation (gray) over Jurassic Aztec Sandstone (pink). Docsity.com

FaultsFaults

• Strike slip fault
  • Dominant displacement is horizontal and parallel to the strike of the fault
  • Types of strikes lip faults
    • Right lateral – as you face the fault, the block on the opposite side of the fault moves to the right
    • Left lateral – as you face the fault, the block on the opposite side of the fault moves to the left