Mid-ocean ridge lava
The middle of the ridges, where eruptions take place, are littered with pillow lavas – interconnecting sack-like bodies of solidified magma. Lavas also spread out to make flat, think sheet flows. The old, solidified outer surfaced of the underwater flows insulate the molten rock, allowing the magma to flow for great distances. Large amounts of lava do not erupt at any one spot: they erupt intermittently along all the ridges, so that large individual volcanoes do not form.
Topic: Earth Science
Keywords: Lava, Magmas, Mid-ocean ridges, Ocean bottom, Volcanic eruptions, Volcanism, Volcanoes