There are several types of igneous rock that are porous, meaning that bubbles are created during their formation and leave holes behind. The most porous is pumice, which becomes a rock as it shoots out of a volcano and has many tiny holes in its solid form. It is light enough to float, but cannot be filled with a liquid because the pares are so tiny and do not connect.
Scoria, a reddish rock, and basalt, which is usually black and heavier, can also be very porous and also come from volcanic eruptions.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC