What types of lava do you get undersea?
Paul
Dear Paul,
Pillow lava is the only type of lava under water. The pressure caused by
the weight of the overlying water and the rapid quenching of the lava
influence the shape of the flows. You might have a look at question 41
in 12. Volcanoes in General in Ask a Volcanologist.
Steve Mattox, University of North Dakota