Mt. Vesuvius has dacitic to rhyolitic lava. Dacitic lava's silica contents are lower than those of rhyolitic lavas. Both dacitic and rhyolitic lavas are viscous and both can cause great destruction.Know More
Dacitic lava is gray or black in color. It contains minerals such as pyroxene, amphibole, feldspar and 63-68 percent silica. The eruption temperature for dacitic lava is 1,500 to 1,800 degrees Fahrenheit. Dacitic to rhyolitic lava is so dangerous because it contains a high amount of crystals.
Mt. Vesuvius erupts according to the Plinian model of eruption. This involves a column of ash as tall as 28 miles being pushed up from the volcano into the stratosphere. An umbrella-shaped cloud of ash forms at the top of the column. The Plinian column can collapse and create fast and destructive volcanic mudflows. These eruptions are also described as explosive, as the volcano produces a mix of gas and solid particles, which cover the territory around the mountain.
Mt. Vesuvius' most famous eruption occurred in 79 A.D, when two Roman towns of Pompeii and Herculaneum, near Naples, were destroyed together with all their inhabitants. Buildings were buried under the layers of mudflows, ash, pumice and volcanic rocks, and became time capsules for historians to study the everyday life in the Roman Empire.Learn more about Volcanoes
Volcanologists wear heavy boots, long-sleeved shirts and heavy work gloves in order to protect their bodies from lava near a volcano. According to Oregon State University, volcanologists might also wear jeans, a rock-climbing helmet for protection and a gas mask.Full Answer >
One of the primary differences between pahoehoe and a'a lava formations is in terms of texture, where pahoehoe lava is smooth and viscuous while a'a lava is rough and rubbly. Pahoehoe lava also flows and cools down at a much slower rate compared to a'a lava.Full Answer >
According to the American Geophysical Union, lava forms in the Earth's mantle and flows to the surface through volcanoes. Internal gas pressure within the volcano causes it to spew lava with the amount of pressure depending on how much and how quickly.Full Answer >
The worst thing about living near a volcano is the possibility of it erupting, bringing about many negative consequences, such as earthquakes, lava flows, mud flows, flooding, pyroclastic flows, falling ash, carbon dioxide, sulfur dioxide and other toxic gases. In the past, volcanic eruptions have obliterated entire towns and villages and caused great loss of life.Full Answer >