Geochemistry, Depositional Environment, and Provenance of the Cretaceous Radiolarian Chert in Northeastern Kurdistan, Iraq
The radiolarian chert rocks are one of the most important south park fitted hat indications of the existence of ophiolites because they are a source of silica supply.These rocks have been studied to refute and reject the idea that ophiolites do not existed.The Si/(Si+Al+Fe+Ca) ratio in the radiolarian chert indicates that the silica is of biogenic