Quaternary sediments of the North Fayium depression. are mainly represented by residual soil and calcrete. and have been found to be anomalously radioactive. These sediments are deposited on the irregular surface of the carbonaceous shale of the middle member of the Oligocene Qatrani Formation in the northern part of the Fayium depression. https://megavitamines.shop/product-category/sea-echinamide-immune-burst/