An entry at www.sciencedirect says, “Extensive tar sands with reserves of about 41 billion barrels of oil are known to occur in Cretaceous terrigenous sediments in Ondo and Ogun states. The hydrocarbon occurs in two predominantly sandy zones separated by an eight-metre thick oil shale.”
Browsing: Concrete roads
As the federal government plans to introduce concrete roads across the country, the Cement Producers Association of Nigeria has warned that the development will raise the price of cement to N9,000 per bag from the current price of N5,000.