Facies patterns within the Late Pleistocene raised coral reefs at Rabigh area, Red Sea coast, Saudi Arabia exhibit lateral

Sixteen well preserved Pelecypod and gastropod shells were analyzed for their Mn, Ni, Co, Cu, Zn and Pb content. Eight
shells are belonging to the Pleistocene of Gebel El-Zeit and eight recent shells were collected from El-Zeit Bay. Average

In order to assess the pollution levels of selected heavy metals, 45 bottom sediment samples were collected from Al-Kharrar lagoon in central western Saudi Arabia. The concentrations of the heavy metals were recorded using inductively coupled plasma-mass spectrometer (ICP-MS). The results showed that the concentrations of Pb and Cd exceeded the environmental background values. However, the heavy metal contents were less than the threshold effect level (TEL)

In order to assess pollutants on the Tarut Island coast, Saudi Arabian Gulf, 38 coastal sediment samples, 40 mollusk specimens, and 26 seawater samples were collected for Fe, Cu, Pb, Mn, Cd, Se, As, Co, B, Cr, Hg, Mo and Zn analysis using inductively coupled plasma–mass spectrometer. The analysis indicated that the coastal sediments were enriched, polluted and contaminated with As, Pb, Cd and Hg. Gastropods were good accumulators for Fe, Cu, Zn, Pb, Mn, Cd and Co while bivalves were good accumulators for Se, Cr and Hg.

In order to assess the distribution of mercury along the Tarut coast, Arabian Gulf, Thirty eight (38) sediment samples, twenty six (26) seawater samples, and forty (40) Mollusca specimens were collected from the Tarut coast. The concentrations of Mercury in the sediments of the studied area (average ¼ 0.55 mg/g) are generally high comparing to the reported values from the Gulf of Oman, Red Sea, and the Gulf of Finland.

The Campanian Hajajah Limestone Member of the Aruma Formation was formed during two regressive 
episodes. Each of them formed of three depositional facies, from base to top: 1) intra-shelf basin facies,
made up of fossiliferous green shale and mudstone with ostracods and badly preserved foraminifers. 2)

To document the frequency and diversity of molluscs and the factors controlling their distribution along the coastline of Tarut Island, Arabian Gulf, 4221 gastropod valves and bivalve shells were collected from 10 stations along the coast. 30 gastropod and 32 bivalve species belong to 49 genera and 33 families/superfamilies were identified. Stations 5 and 7 recorded the highest abundance of gastropod and bivalve respectively. Family Veneridae represented 85% of the recorded bivalves, while Ceriithiidae represented 41% of the recorded gastropods.