Introduction to KaritaneIntroduction to Karitane

Natural LandscapesNatural Landscapes

Coastal ProcessesCoastal Processes

Karitane Looking SouthKaritane Looking South

Karitane Looking NorthKaritane Looking North

Sketch of Area of StudySketch of Area of Study

• Donated by Jonny (past student).

Karitane BackgroundKaritane 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 FeaturesPeninsula 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 StacksMother-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.

ArchesArches

• This arch is the reminents of a blow-hole which has eroded out.

• Eventually this will collapse and form a isolated inlet or bay.

BlowholesBlowholes

• 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 SpitThe 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 BasaltColumnar 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 layersCliff 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.

SummarySummary

• 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.