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F.4B Geography Field trip

F.4B Geography Field trip. Place: Shek O Date:26/4/02 Time: 12:35 pm. Why take a field trip?. Suggest……. What are your objectives?. What do I want to learn?. Objectives. Map orientation The coastal ecosystem – inputs and outputs Observe coastal features Observe weathering features

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F.4B Geography Field trip

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  1. F.4B Geography Field trip • Place: Shek O • Date:26/4/02 • Time: 12:35 pm

  2. Why take a field trip? • Suggest……

  3. What are your objectives? • What do I want to learn?

  4. Objectives • Map orientation • The coastal ecosystem – inputs and outputs • Observe coastal features • Observe weathering features • Rock types • Prepare a field report • To relax and enjoy a warm and lovely afternoon

  5. What is my expectation? • You should take an active part to learn. • Answer my questions on the features along the trip – at least once per student • Write down anything you consider important • Take photos of features and your friends of course.

  6. Map orientation • Orient the map using a compass. • Identify and name the landforms in the surrounding.

  7. Wave counts • Study the swash and backwash. • Count the number of breaking waves per minute. • Determine whether the wave is constructive or destructive.

  8. Coastal ecosystem • The main components – the 4 spheres • Atmosphere – sunlight, wind • Lithosphere – coastal zone; sediment supply • Hydrosphere – waves, erosion and deposition • Biosphere – plants and animals along the intertidal zone

  9. Who am I? What am I??? • Study the features from 1 – 15. • Tell me what they are.

  10. Erosional Coastal Features • Cliff and wave-cut platform - a flat rocky surface stretching from the coast to a cliff behind. It is formed by wave erosion. A notch is cut on the slope bordering the coast in the beginning. The cliff is then gradually cut back by wave erosion and slumping of the upper part to form a flat rocky platform

  11. Erosional coastal features • Geo - it is a narrow inlet bounded by vertical cliff on both sides. Note how the faults in the rock encourage the development of geos along the coast of Ng Fan Chau. • Reef - a rocky stretch very near sea-level. It may be exposed at low tide.

  12. Depositional features • Tombolo - a dumb-bell shaped feature, formed of a spit or bar connecting an island to the mainland or two islands together. • Beach - a long narrow belt of sand, gravel or boulder deposits.

  13. Rock type & formation – use the booklet • Granite - an intrusive rock formed in batholith. It is coarse-grained. There are three sets of joints. Crystals of quartz, feldspar and mica are clearly visible. • Feldspar porphyry – feldspar phenocrysts in a dark groundmass • Others

  14. Weathering features • Physical weathering • Block disintegration - the splitting of large blocks of rock along their joint planes when alternate expansion and contraction of the rock mass are caused by a rise or fall of temperature.

  15. Weathering Features • Chemical weathering • Honey-comb weathering - rain-drops and sea sprays carrying chemicals which can dissolve some minerals like feldspar in the rock. The effect is especially noticeable in coarse -grained granite which may be pitted with numerous holes.

  16. Look at the following cases…what do you think? • I must go to the toilet, so I do so quickly. Nobody knows!! Ha! Ha! • I see a beautiful fish swimming in water. I want to catch it but I do want my teacher to know. So I walk into the sea quietly. • I climb down to the wave cut platform to explore about the feature. I can learn more than my classmates

  17. I am late. I think my classmates and my teachers will wait for me. • I am not interested. So I am very unhappy. • I have questions. I am afraid to ask. • It is very hot. I feel exhausted. I am fainting but I do not want anybody to know.

  18. Precautions • Do not stay away from your teacher and your group. • Always work in groups. • No eating or drinking on the bus. • Bring a bottle of water. An umbrella if necessary • No walkman or discman • Take care of your personal belongings such as mobile phone

  19. That is all! • Watch the film on coastal landforms

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