Erosion Landform ( 09.Hogback )

                                                                                                                                                      Back to Erosion Landform

  • hogback is a homoclinal ridge.
  • Formed from a monocline.
  • Composed of steeply tilted strata of rock.
  • Protruding from the surrounding area.
  • The name comes from the ridge resembling the high.
  • The two strata compose a hogback.
  • It has different types of sedimentary rock with differing weathering rates.
  •  The softer rock erodes more quickly.
  • Hogbacks are found as ridges along the;
                                Eroded  large flanks 
                                Tightly folded anticlines

  • Hogback has steep dip slope.
  • That is greater than 30° - 40° with a near symmetric slope on each ridge face.
  • Most Hogbacks snake along a surface in a relatively straight line.
  •  The Dakota Sandstone Hogback encircles the Black Hills.
  • An elliptical dome spanning from northwestern South Dakota to northeastern Wyoming
  • The Black Hills are approximately 125 miles long and 65 miles wide. 
  • The Dakota Hogback ridge formed resistant layers of the Dakota Sandstone.

  • Green Mountain known as the Little Sundance Dome.
  • It is found  east of Sundance, Wyoming.
  • It is a circular dome about 1800m across & 1400m wide.

Hogback Mountain
Hogback Mountain 

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