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.
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
Examples of cinder cone volcanoes are Kula and Karapinar in Turkey; Taal Volcano in the Philippines; Hverfjall in Iceland; El Jorullo, Parícutin and Pinacate Peaks in Mexico; Mounts Leura, Fox and Elephant in Australia; Royal Society Volcano in Antarctica; Manda-Inakir on the Ethiopia-Djibouti border and Barren Island in the Andaman Islands. The United States hosts over 100 cinder cones, mainly in western states and Hawaii.Full Answer >
Make a volcano project by building a paper-mache volcano, measuring out the baking soda and adding vinegar. For this project, gather a 1-liter empty plastic bottle, a piece of cardboard, newspaper, flour, water, paint, dishwasher detergent, food coloring, baking soda and vinegar.Full Answer >
The most common and serious types of volcanic hazards are flowing lava, falling ash, glowing avalanches and moving mud and debris. The exact hazard level varies depending on the type of volcano erupting. Additional hazards include the emission of hazardous gases and eruption clouds, which are dangerous to planes and helicopters.Full Answer >
Scoria can be found in areas of the Earth where volcanic activity has occurred. Ranging in color from black to dark red, it is an igneous rock riddled with air bubbles. Scoria is created as gas escapes from a volcano and rock solidifies around it.Full Answer >