ands owned by Yemen. The first island, Sholan Island, emerged in an eruption in December 2011, and the second island, Jadid, emerged in September 2013. Approximately 40% of the Red Sea is quite shallow at less than 100 m (330 ft) deep, with about 25% less than 50 m (160 ft) deep. Oil and gas Undiscovered oil reserves in the region have been estimated at 801.5 million cubic metres (5,041 million barrels). Undiscovered gas reserves in the region have been estimated at 3,180 billion cubic metres (112,349 billion cubic feet). Undiscovered natural gas reserves have been estimated at 489 million cubic metres (3,077 million barrels). Most of these plays are controlled by the structure of the basin. Normal faults are common as the Red Sea occupies an active diverging margin. These targets are commonly found below the Salt deposits of the Middle Miocene. Modern development is focused on the following fields. The Durwara 2 Field was discovered in 1963, while the Suakin 1 Field and the Bashayer 1A Field were discovered in 1976, on the Egyptian side of the Red Sea. The Barqan Field was discovered in 1969, and the Midyan Field in 1992, both within the Midyan Basin on the Saudi Arabian side of the Red Sea. The 20-m thick Middle Miocene Maqna Formation is an oil source rock in the basin. Oil seeps occur near the Farasan Islands, the Dahlak Archipelago, along the coast of Eritr