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STRUCRURAL LAND SCAPE GEOGRAPY
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STRUCTURAL LANDSCAPES
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MESA
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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
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BUTTE
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POINTED BUTTE
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CLOSE -UP
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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
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CONICAL HILL CAP IS REMOVED Also named inselberg
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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
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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
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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
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Time. . .
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