الفهرس 
Geology and Geomorphology of Red Sell Coastal PlainsOnly 14 pages are availabe for public view
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Abstract
The Red Sea coasts are considered as major historic and touristic sites offering an urban
attraction that plays an important mounting role in the tourism industry of Egypt. Therefore, a
huge future construction and development process is expected in these areas. The existing
deposits along the Red Sea coasts differ entirely from common soils and rocks covering the
remaining parts of our country. It is therefore essential to combine the role of geology, hydrology
and geotechnical engineering in the study of these obscured deposits.
The origin of coastal deposits adjacent to the Red Sea is either from the land side, where
sediments are transferred from the upstream eroding catchment areas to the coastal plains in the
form of alluvial fans, or from the sea where deposits are usually carbonate rocks (reefal
limestone) that were formed through cementation of the remains of marine organisms. Sharrn EI
Sheikh was selected for this research as a demonstrative example for identifying some of the
engineering problems which may be encountered along the Red Sea coasts.
Core samples of reefal limestone were collected during drilling of nineteen boreholes in a
selected s.te at Sharm EI Sheikh, and were tested under uniaxial compression. The results indicate
relatively high Young’s modulus values of920 to 4230 MPa and low strength of 4 to 16 MPa.
The Rock Quality Designation (RQD) of these cores varied from 0 to 25% and the Rock Mass
Rating (RMR) was estimated to range between 25 and SO.
Geotechnical constrains that can. ,be faced during construction on these types of deposits were
identified. Problems can arise due to the presence of cavities of various sizes within the reefal
limestone or due to potential swelling and/or collapse of some of the alluvial deposits.
Kev Words: Geomorphology, Hydrology, Sediment transport, Alluvial fans, Reefal plains,
Reefal limestone, Raised beaches, Unconfined compressive strength, RQD, RMR.