Haruj and Ergs Ubari and Murzuq in Central Libya26.7N 13.9E
The large, circular brown area in the midst of the Libyan Desert, south of the Mediterranean Sea, is the Haruj Volcanic Field. The field stretches over 45000 km2 in the central part of the country.
To the east and southeast of the Haruj are two large ergs, or sand dune seas, separated by a ridge of sandstone. The erg north of the mountains is Erg Ubari (also called Awbari), while the one to the south is Erg Murzuq (also called Murzuk).