A '''lava delta''' is formed by [[lava]] entering the [[sea]] and building a wide, fan-shaped area of new land. Such new land is usually built on sloping layers of loose [[lava]] fragments and flows. On steep submarine slopes, these layers of debris are unstable and often lead to the sudden collapse of '''lava deltas''' into the sea.<ref>http://volcanoes.usgs.gov/Products/Pglossary/LavaDelta.html</ref> | A '''lava delta''' is formed by [[lava]] entering the [[sea]] and building a wide, fan-shaped area of new land. Such new land is usually built on sloping layers of loose [[lava]] fragments and flows. On steep submarine slopes, these layers of debris are unstable and often lead to the sudden collapse of '''lava deltas''' into the sea.<ref>http://volcanoes.usgs.gov/Products/Pglossary/LavaDelta.html</ref> |