My Geography Sba

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What Coastal Features are formed by waves along a section of the Palisadoes Tombolo in Kingston and Green Wall in St. Thomas, Jamaica?
Kashaun Smith

School: Wolmer’s Boys School
Year: 2013-2014

Table of Contents Page Title Page Number
Aim of Study
Location of Study Area
Presentation and Analysis of Data

Aim of Study The aim of study is to determine and describe the coastal features observed along a section of Palisadoes Tombolo and Green Wall in St. Thomas, Jamaica.

Location of Study Area

Methodology On Monday, May 20, 2013, the Geography Department of Wolmer’s Boys’ School organized for students to visit sections of the South East coastline
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Longshore Drifting occurs due to waves meeting the beach at an oblique angle, and backwashing perpendicular to the shore, moving sediment down the beach in a zigzag pattern. Longshore drifting is complemented by longshore currents, which transport sediment through the water alongside the beach. These currents are set in motion by the same oblique angle of entering waves that causes littoral drift and transport sediment in a similar process.

Locality: Green Wall
At Green Wall, the type of wave observed from top of the cliff was constructive wave which was evident because of the wave frequency being 6.8 waves per minute. The fetch of the waves were fairly extensive with the wave height being 0.5metres. There was also a wave cut platform at Green Wall. The position of the cliff in relation to the wave cut platform is about 100metres. The presence of the wave cut platform breaks the energy of the wave and its powerful material is deposited and it forms a beach. About 80metres from the edge of the cliff, a cave was observed. The cave was developed due to the processes of hydraulic action and corrosion. A small bay was also observed and consisted of mainly pebble and cobble sized material. Towards the right side of the bay an isolated pillar of rock was observed in the sea.

This feature may have been formed due to preferential erosion along both sides of the headland which created caves which join together and create an arch. Continued erosion