The second largest deposit is located at Timahdit, about 250 kilometres (160 mi) southeast of Rabat.[1] Geologically, it comprises two basins: El koubbat and Angueur synclines.[5] The oil shale formation is about 70 kilometres (43 mi) long and 4 to 10 kilometres (2.5 to 6.2 mi) wide. The volume of the El koubbat syncline formation is about 250 square kilometres (97 sq mi); the Angueur syncline area is about 100 square kilometres (39 sq mi).[5][6] The deposit is estimated to consist of 42 billion tons of oil shale, containing 16.1 billion barrels (2.56×10^9 m3) of shale oil.[1] The oil shale formation's thickness varies from 80 to 250 metres (260 to 820 ft).[5][6] Its moisture content is 6–11% and sulfur content is about 2%. On average it yields 70 litres (15 imp gal; 18 US gal) of shale oil per one ton of oil shale.[6] As the Timahdit deposit is located near Ifrane National Park and Haut-Atlas Oriental National Park, oil extraction is an environmentally sensitive issue.[7]