STRUCRURAL LAND SCAPE GEOGRAPY

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Presentation transcript:

STRUCRURAL LAND SCAPE GEOGRAPY

STRUCTURAL LANDSCAPES

MESA

Features associated with horizontal strata The underlying sill is exposed to surface erosion Mesa – the horizontal is longer than the vertical E.g. Karoo landscape

BUTTE

POINTED BUTTE

CLOSE -UP

Butte and pointed butte The mesa continues to erode backwards – (scarp retreat) and forms a butte then a pointed butte The vertical is longer than the horizontal The cap rock is still present E.g. Karoo landscape

CONICAL HILL CAP IS REMOVED Also named inselberg

INCLINED FEATURES Underlying rock :laccolith; lopolith; syncline; anticline Exposed to weathering and erosion - the features are seen There is a very prominent scarp and dip slope Trellis river pattern prominent – because of alternating hard and soft rock

MASSIVE IGNEOUS ROCK If the BATHOLITH OR. . . On a smaller scale lopolith and lacolith are exposed to erosion a dome is formed Usually granite rock Radial river pattern prominent

TORS If the underlying massive igneous rock has many joints and fissures it is vulnerable to weathering and erosion The core stones are left that balance on top of each other

Time. . .