Changes

[[Image:Plinian_eruption.jpg|thumb|300px|A plinian-type explosive eruption from the Crater Peak vent (hidden beneath clouds) on Mount Spurr, Alaska, sent an eruption column to a height of about 18 km above sea level]]'''Plinian eruptions''' are large explosive events that form enormous dark columns of tephra and gas high into the [[stratosphere]] (>11 km). Such eruptions are named for [[Pliny the Younger]], who carefully described the disastrous eruption of [[Vesuvius]] in 79 A.D. This eruption generated a huge column of tephra into the sky, pyroclastic flows and surges, and extensive ash fall. Many thousands of people evacuated areas around the volcano, but about 2,000 were killed, including [[Pliny the Elder]].<ref>http://volcanoes.usgs.gov/Products/Pglossary/PlinianEruption.html</ref>

[[Image:Plinian_eruption.jpg|thumb|300px|A plinian-type explosive eruption from the Crater Peak vent (hidden beneath clouds) on Mount Spurr, Alaska, sent an eruption column to a height of about 18 km above sea level]]'''Plinian eruptions''' are large explosive events that form enormous dark columns of tephra and gas high into the [[stratosphere]] (>11&nbsp;km). Such eruptions are named for [[Pliny the Younger]], who carefully described the disastrous eruption of [[Vesuvius]] in 79 A.D. This eruption generated a huge column of tephra into the sky, pyroclastic flows and surges, and extensive ash fall. Many thousands of people evacuated areas around the volcano, but about 2,000 were killed, including [[Pliny the Elder]].<ref>http://volcanoes.usgs.gov/Products/Pglossary/PlinianEruption.html</ref>

==References==

==References==