Volcanic bombs form during many eruptions. The patinas of reddish brown or bluish iridescence formed when the bombs’ outer layer reacted with the oxygen in the atmosphere.
Topic: Earth Science
Keywords: Volcanoes, Volcanic ash, tuff, etc., Geology, Structural, Volcanic eruptions
While still airborne, a molten blob of magma twisted through the air, stretching and bending itself into this formation, known as a spindle bomb.
This bomb formed around a nugget of chilled rock.
This bomb’s exterior is filled with gas bubbles.
When the bomb hits the ground and hurtles down the slope, making a whirring noise, its corners become sheared, and the hardened form appears as a smooth, rounded lump.