In the upper left quadrant, bluish sediments can be observed around Djerba, the largest island of North Africa, located in the Gulf of Gabes, off the coast of Tunisia. The island has a surface area of 514 km²,
Visible to the southeast is the Haruj, a large volcanic field spread across 45,000 km2 (17,000 sq mi) in central Libya. Appearing here as a large brown area amidst the yellow desert sands, it contains about 150 volcanoes, including numerous basaltic scoria cones and about 30 small shield volcanoes, along with craters and lava flows.