In some littoral cones on Hawaii that were formed by pahoehoe lava flows, the collapse of a lava bench and subsequent steam explosions formed the cones instead.
12.
Usually littoral cones are formed by aa lava as their fragmented nature allows ideal water-lava interactions, but pahoehoe and intermediary lavas can also form littoral cones.
13.
Usually littoral cones are formed by aa lava as their fragmented nature allows ideal water-lava interactions, but pahoehoe and intermediary lavas can also form littoral cones.
14.
However, when " a'a " enters the ocean it forms a littoral cone, a small cone-shaped accumulation of tuffaceous debris formed when the blocky " a'a " lava enters the water and explodes from built-up steam.
