Zelten, town site at the first exploited oil field in Libya. Located 105 miles (169 km) south of the Mediterranean port of Marsa el Brega on the Gulf of Sidra, at the foot of the Zelten Mountains, the town is in the centre of the so-called oasis group of oil fields that includes Jālū (Gialo), Wāḥah (Waha), and Al-Rāqūbah (Raguba). Discovered in 1959 and recognized as the country’s first large strike (17,500 barrels per day), the Zelten oil field is connected to Marsa el Brega by pipeline (completed 1961). The area also has a gas recovery plant.