Where groups geological formations by the place each one actually is. The Grand Canyon, Wikipedia notes, "is 277 miles (446 km) long, up to 18 miles (29 km) wide" and lies in Arizona, United States. Browsing by location lets a visitor see every formation standing in one part of the world.
Facts
Comparison
Formation OriginA vent or fissure allowing hot lava, ash and gases to escape from a magma chamber below the surface. 1 Chad
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Sources
1. Wikipedia: Volcano
WikipediaVolcano, lead sectionQuote, Volcano, lead section
A volcano is a vent or fissure in the crust of a planetary-mass object that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
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