Controlling factors of recent clastic coastal sediments (Viransehir,Mersin bay,S Turkey) |
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| Authors: | Murat Gül Ahmet Özbek Mehmet Ali Kurt Kemal Zorlu |
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| Institution: | (1) Department of Geological Engineering, Engineering Faculty, Mugla University, 48000 Kotekli, Mugla, Turkey;(2) Department of Geological Engineering, Engineering-Architecture Faculty, Kahramanmaras Sutcu Imam University, 46100 Avsar, Kahramanmaras, Turkey;(3) Department of Geological Engineering, Engineering Faculty, Mersin University, 33324 Ciftlikkoy, Mersin, Turkey |
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| Abstract: | The Plio-Quaternary conglomeratic sets within the marine environment of the Viranşehir coast (W Mersin, S Turkey) are responsible
for the evolution of sandy and gravely beaches due to their control on various factors such as sea floor irregularity, wave
energy, and organic activity. The conglomeratic sets close to the shoreline (50–150 cm) act as wave breakers, creating hard
substratum and high energy, well-oxygenated environment for organisms like Patella sp., Phoronida worms and Brachidontes pharaonis (Fischer P. 1870). The boring activities of these organisms have disintegrated the sandy matrix of these sets. Finer-grained
matrix sediments have been transported to the interset and open sea, while cobble–pebbles have been carried landwards and
have created imbricated gravely beach deposits without matrix. Sandy beach is evolving where the conglomeratic sets away from
the shoreline (5.0–10.0 m). In this example, sets form a bar; causing fivefold division as backshore, berm, surf zone, bar
and offshore from land to sea. Poorly sorted, cobbles-pebbles cobbles and pebbles are found associated with the high-energy
environments of bars, whilst well-sorted sands are observed in low energetic environments on shore. The sets and recent shell
fragments are the main sources of coastal sediments in Viranşehir. However, the amount of shell fragments decrease towards
the active river mouth. This is due to sediment and fresh water influx from the river causing deteriorated temperature, salinity
and light penetration of the marine environment resulting in less organic diversity.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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| Keywords: | Recent coastal sedimentation Host rock Bioerosion Sea wave Base topography |
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