Meidob is a volcanic field which covers an area of in east-west direction. The field consists of cones and lava flows, which form a thick pile in the middle of the field in the form of a plateau. The central area lies at higher elevations than the peripheral parts of the volcanic field and its maximum elevation is . It features fallout and pyroclastic flow deposits in addition to cones and lava flows. Ignimbrites occur in some places.