lava « Back to Glossary IndexLiquid rock on the surface of the Earth. Related Articles: Glossary: aaGlossary: pahoehoeGlossary: Siberian Trapps7 Geologic Time5 Weathering, Erosion, and Sedimentary Rocks« Back to Glossary Index Author: Chris Associate Professor, Salt Lake Community College, Salt Lake City, Utah View all posts by Chris