Erosion Landform ( 09.Hogback )

                                                                                                                                                      Back to Erosion Landform

• A 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
                                Synclines

• 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