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STRUCRURAL LAND SCAPE GEOGRAPY

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.

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STRUCRURAL LAND SCAPE GEOGRAPY

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  1. STRUCRURAL LAND SCAPE GEOGRAPY

  2. STRUCTURAL LANDSCAPES

  3. MESA

  4. 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

  5. BUTTE

  6. POINTED BUTTE

  7. CLOSE -UP

  8. 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

  9. CONICAL HILL • CAP IS REMOVED • Also named inselberg

  10. 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

  11. 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

  12. 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

  13. Time. . .

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