John Seach, Volcano Live

 Pillow Lava - John Seach

Pillow lava forms when lava flows come in contact with water.
The lava takes on a variety of shapes including -
pillow -shaped, blister-shaped, mattress-shaped, sack-like, balloon-like.

Basaltic pillow lava is usually less than 1 m in diameter , but may reach 7 m in some cases.
Clay and sand may fill the spaces between the pillows.

Pillow lava
Copyright John Seach