East West Active salt marsh Relict marsh mud Sand St. Catherines Island East Wes

Question

East West Active salt marsh Relict marsh mud Sand St. Catherines Island East West Relict marsh mud Active salt marsh Ocean Sand DEast Ocean o ikm Active salt marsh Sand tive salt marsh Relict marsh mud Figure 15.5 St. Catherines Island, Georgia. St. Catherines Island is part of a barrier island complex that has been actively evolving for thousands of years. A. Geological sketch map showing distribution of sand, active salt marsh with its living community s and animals, and relict marsh mud on St. Catherines Island, centered around 31.634"N, 81.157°W. Some of the sand in the interior of the island is ancient (Pleistocene), but the sand along the eastern edge of the island is thinner and more recently The locations where the three photographs were taken are indicated at points B, C, and D, along with lines indicating the field of view of the photos. B. View south-southeast from point B on map at low tide. The dark-brown "ribbon" adjacent to ocean is relict marsh mud. Light-colored area is sand. C. View south from point C on map at low tide. D. View southeast from point D (Aaron's Hill) on map. Laboratory 15 Coastal Processes, Landforms, Hazards, and Risks 401

Explanation / Answer

1) As the sea level falls down but previously at low energy time when sea level was high fine-grained sediments, such as silt and carbonate muds were deposited.

2) Initially the sea level was high at the highstand time thesands were deposited.

3) The process is known as Transgression where facies shift towards lanward side. Retrogradational patterns are observed.

4) The lower parts of the hill will start eroding due to high energy waves & the formation of cliff will start.

5) No, it will not be a good location for hotel for long term or period but a temporary construction can be made as the the scenic beauty of the place will enhace tourist attraction.

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