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Volcano Term Definitions
A body of igneous rocks with a flat bottom and domed top. It is parallel to the layers above and below it.
A series of unmanned satellites orbiting at about 706 km (438 miles) above the surface of the earth. The satellites carry cameras similar to video cameras and take images or pictures showing features as small as 30 m or 80 m wide, depending on which camera is used.
Literally "little stones." Round to angular rock fragments, measuring 1/10 inch to 2 1/2 inches in diameter, which may be ejected in either a solid or molten state.
Magma which has reached the surface through a volcanic eruption. The term is most commonly applied to streams of liquid rock that flow from a crater or fissure. It also refers to cooled and solidified rock.
A tunnel formed when the surface of a lava flow cools and solidifies while the still-molten interior flows through and drains away.
Delicate, translucent sheets of spatter filled with tiny glass bubbles.
Of or pertaining to stone.
The reflection of light from the surface of a mineral.