The MAR rises above the surrounding ocean floor and its rift valley is the divergent boundary between the North American and Eurasian plates in the North Atlantic and the South American and African plates in the South Atlantic. The MAR produces basaltic volcanoes in Eyjafjallajökull, Iceland, and pillow lava on the ocean floor. The depth of water at the apex of the ridge is less than in most places, while the bottom of the ridge is three times as deep.
the mar rises above the surrounding ocean floor and its rift valley is the divergent boundary between the north american and eurasian plates in the north atlantic and the south american and african plates in the south atlantic the mar produces basaltic volcanoes in eyjafjallajökull iceland and pillow lava on the ocean floor the depth of water at the apex of the ridge is less than in most places while the bottom of the ridge is three times as deep