Organisms as carbonate producers in modern and ancient marine environments were investigated in our country recent years in detail because of preserving biochemical history on their shells. In this study, the relations among fossilspecies environmental conditions and modern geological anomalies were searched throughly by determining paleontologic, mineralogical and geochemical, features of some modern foraminiferal shells. Foraminiferal tests collected from two submarine sediment samples in iskenderun Bay were studied by whole-rock (XRD and AAS) and microprobe methods, and in this way elements being the cause of colorful on the shells were semi-quantitatively /quantitatively measured. 11 genus and 17 species of modern foraminifers were observed in these samples. Green, black, pink, gray and yellow colored parts are observed in the encountered foraminiferal species. Foraminiferal shells of Sample No.36 mainly contain aragonite and Mg-calcite, less anhydrite, dolomite and quartz. Foraminiferal shells of Sample No. 125 are made up of abundantly calcite, Mg-calcite, aragonite and rarely dolomite, quartz and siderite. The richnesses in Cu, Zn and Pb were determined although element concentrations of foraminifer shells show a variation in wide range. It is explained that an abnormal contamination within the shells are caused by enrichments in the sea water of ions transported with hot waters coming from active faults. Moreover, it should be expected that these elements are secondarily got rich during metabolism by livings. Mg/Ca ratios of shells vary between 11.63 and 219.23. A temperature of 21-51 C are found by setting up a relationship between Mg/Ca ratio of calcites in benthic foraminifers and sea-floor water temperature. The anomaly in the sea-floor water temperature and richness in the concentrations of some elements can indicate hydrothermal springs related to present fracture lines.