F.4B Geography Field trip

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F.4B Geography Field trip

• Place Shek O
• Date26/4/02
• Time 1235 pm

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Why take a field trip?

• Suggest

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What are your objectives?

• What do I want to learn?

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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

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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.

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Map orientation

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

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Wave counts

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

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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

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Who am I? What am I???

• Study the features from 1 15.
• Tell me what they are.

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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

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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.

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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.

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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

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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.

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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.

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Look at the following caseswhat 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

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• 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.

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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

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That is all!

• Watch the film on coastal landforms