Introduction to Karitane
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Introduction to Karitane






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Introduction to Karitane Introduction to Karitane Presentation Transcript

  • Introduction to Karitane Natural Landscapes Coastal Processes
  • Karitane Looking South
  • Karitane Looking North
  • Sketch of Area of Study
    • Donated by Jonny (past student).
  • Karitane Background
    • Karitane is a unique beach, because it has many features.
    • It is located 50km north of Dunedin.
    • It is around 2 ― 4km long.
    • These video clips give some idea of what you will see on the field trip. (Don’t comment on the voice-over, or camera work please)
  • Peninsula Features
    • Karitane Peninsula has many features, it is made up of volcanic and sedimentary rocks.
    • Pictured right is rock formation found at the base of the Peninsula.
    • In this case it has formed stacks.
  • Mother-Child Stacks
    • The above picture is of the Mother-Child Stacks.
    • This is formed by caves that became arches which collasped to form these stacks.
    • The Mother stack is larger and protects the child.
  • Arches
    • This arch is the reminents of a blow-hole which has eroded out.
    • Eventually this will collapse and form a isolated inlet or bay.
  • Blowholes
    • This feature is where a collapsed cave is.
    • This cave is sunken below waterline and as the tide rises it crashes up causing spray to rise through the hole.
  • The Spit
    • This sand spit is formed by longshore drift, and movement.
    • At lowtide the esturary behind the spit is empty.
    • At high tide it is filled by incoming water.
  • Columnar Basalt
    • This is a volcanic rock.
    • How do you think it got there?
    • Why has it not eroded in comparison to the rest of the beach?
    • Will it still be there in 50-100years?
  • Cliff face/Sediment layers
    • You can see in this photo that there are many sediment layers that make up the face.
    • Each layer is a different colour due to the different chemicals and minerals in the sediment as it was deposited.
    • This peninsula was then uplifted by tectonic uplift.
  • Summary
    • Karitane is a unique place with interesting features.
    • Each feature is formed by different processes acting on them.
    • This presentation is going on the network for your viewing along with a mind map presentation to assist you after the fieldtrip and before the exams.