This book is a first attempt to detect the environmental changes in the south parts of Iraq - North west of Arabian Gulf by studied the mineralogical and geochemical variations of the clastic sediments and molluscs shells in Iraqi coastlines and in the banks of southern parts of Shatt Al-Arab and Shatt AlBasrah rivers with determined the variations in the physical and chemical parameters for both of sea and river water.Mohanad Hamid Al-Jaberi was born in Iraq-Basrah city in 1976. He completed B.Sc.degree and MSc in Basrah University, and PhD in Baghdad and Uppsala University. He is lecturer in Geology department of Basrah University.