GEOLOGICAL SPECIMENS ROCK BASALT VESICULAR

• RM6337-01

A vesicular basalt rock sample is a dark-colored, fine-grained volcanic rock with many small, bubble-like holes called vesicles. These vesicles are gas bubbles that were trapped in the lava as it cooled and solidified rapidly. Depending on the density of vesicles, a sample may be heavy vesicular basalt or, if extremely porous, can be considered scoria