In order to assess pollutants and impact of environmental changes along the Saudi Arabian Gulf coast,
forty specimens of gastropod and bivalve shells belonging to Diodora funiculata, Lunella coronata, Cerithium
caeruleum, Barbatia parva, Pinctada margaritifera, Amiantis umbonella, Acrosterigma assimile and
Asaphis violascens from five localities are selected for Fe, Cu, Pb, Mn, Cd, Se, As, Co, B, Cr, Hg, Mo analysis.
The analysis indicated that heavy metal values (except Fe) were less than those recorded in molluscan

Disarticulation, encrustation, bioerosion, fragmentation and abrasion are the recorded taphonomic
processes in the intertidal gastropod and bivalve shells from the northern Red Sea coast, Egypt. Balanoids,
polychaetes, bivalves and bryozoans are the recorded encrusters. Bioerosion traces were predominately of clionid
sponges and gastropods. They are represented by the ichnogenera Entobia and Oichnus. Fragmentation was mainly
resulted from mechanical and biological processes. Many specimens are abraded, lacking-sheen, and showed evidence

This study focuses on the diagenetic sequence under
marine and meteoric conditions as well as isotopes and
trace metals contamination in Quseir and Gebel Zeit areas
along the Egyptian Red Sea coast through a series of modern
and fossil corals, Porites lutea and Favites pentagona. The
diagenetic sequence begins with deposition of thin fringes of
syntaxial aragonite and micritic high-magnesian calcite
in the modern corals to completely altered Porites and
partially altered Favites to low-magnesium calcite in the oldest

26 species belong to 24 genera and 16 families have been described and illustrated from the Callovian
Tuwaiq Mountain Limestone, Khashm Al-Qaddiyah, central Saudi Arabia. 10 of the identified species
belong to scleractinian corals, 7 to brachiopods, 4 to bivalves, 4 to gastropods and one to cephalopods.
Actinastraea pseudominima, Thamnasteria nicoleti, Enallocoenia crassoramosa, Collignonastraea cf. grossouvrei,
Burmirhynchia jirbaensis, Pholadomya (Bucardiomya) somaliensis, Pseudomelania (Rhabdoconcha) raabi

In order to assess pollutants and impact of
environmental changes along the Egyptian Red Sea coast,
seven recent and Pleistocene coral species have been analyzed
for Zn, Pb, Mn, Fe, Cr, Co, Ni, and Cu. Results show
that the concentration of trace elements in recent coral
skeletons is higher than those of Pleistocene counterpart
except for Mn and Ni. In comparison with recent worldwide
reefs, the present values are less than those of Central
America coast (iron), Gulf of Aqaba, Jordan (lead, copper),

Eighteen scleractinian coral species belonging to 13 genera, 8 families and 4 suborders have been identified from the lower
and upper parts of the Upper Jurassic (Oxfordian) Hanifa Formation at Jabal Al-Abakkayn, central Saudi Arabia.
Actinastrea bernensis, A. crassoramosa, Coenastraea hyatti, Stylina kachensis, Cryptocoenia slovenica, C. wegeneri,
Isastrea hemisphaerica, I. bernensis, Montlivaltia cornutiformis, M. frustriformis, Collignonastraea jumarensis, Ovalastrea

Thirty samples of gastropod shells belonging to Nerita albicilla and Canarium (Gibberulus) gibbosus from 15
stations along the Egyptian Red Sea coast were selected for chemical analysis. The analysis indicated that
Nerita is a geochemical marker for a sizeable group of trace elements including; Cu, Pb, Zn, Ag, Th, Ba, Tl, S,
Sc and Se, while Canarium is a good accumulator of the elements, Mo, U, Au and K. Both species have the
same selectivity for Ni, Mn, Fe, As, Sr and P. The differences in sensitivity between the two species are

The shallow-water siliciclastics and carbonates of the Miocene sediments in the Cairo–Suez District,
Egypt represent an epiric ramp. The facies are characterized by stacked high-frequency cycles with
restricted ramp to shoal margin sequences. Based on an extensive micro- and biofacies documentation,
six lithofacies associations were defined and their respective depositional environments were interpreted.
A sequence-stratigraphic analysis was carried out by integrating lithostratigraphic marker beds,