Geology glossary

Bomba vulcanica con una superficie di cracking, simile al pane, causata dalla lenta espansione delle bolle di gas interno durante il raffreddamento.

A breadcrust bomb is a volcanic bomb with a cracked and checkered surface, sometimes resembling the surface of a loaf of bread. The cracks develop when the outer surface of a partially molten lava fragment cools to form a brittle surface and then subsequently cracks as the hot interior expands due to the continued growth of gas bubbles.