English: The dark-colored area in the center of this Space Shuttle view is the alkaline Meidob volcanic field in western Sudan. This broad volcanic field covers an area of 5000 sq km with nearly 700 Pliocene-to-Holocene vents. The margins of the field are dominated by basaltic scoria cones and associated lava flows, but trachytic-phonolitic lava domes, tuff rings, and maars, concentrated along the central E-W-trending axis of the volcanic field, are among the youngest features. The latest dated eruptions took place about 5000 years ago.