When it finally does release, it is volatile and is very explosive. Mount Vesuvius is a composite, or strato-volcano, and is the reason it had such a large explosion. Other famous composite volcanoes include the following: Mount Fuji in Japan, Mount Shasta and Lassen in California, Mount Hood in Oregon, Mount St. Helens and Mount Rainier in Washington, and Mt Pinatubo in the Philippines. (Jeffrey Kluger) The final type of volcanic composition is cinder cone volcanoes. Cinder cone volcanoes are different from shield and composite volcanoes because cinder cone volcanoes only grow to about a thousand feet, and they usually erupt from many openings.
Valles Caldera Volcano The super volcano and the hot magma beneath the caldera can cause an eruption which will cover Las Alamos, and many small towns in the region Brandon Neel 4/9/2014 English 218 History One of the largest and youngest volcanoes and considered a super volcano in the United States is known as the Valles Caldera. The location of the volcano is in the Jemez Mountains by Santa Fe New Mexico. New research from the scientists in the Valles Caldera concerning ejected microscopic textured rock and hot magma beneath the caldera can cause an eruption which will cover Las Alamos, and many small towns in the area. The ejected textured rock from the eruption 60,000 years ago, illustrates that the Valles Caldera is in a new stage of volcanic activity. The hot magma beneath the crust may indicate an eruption tomorrow or near future.
Stratovolcanoes, the most dangerous type of volcanoes, are built by multiple eruptions over many years. Shield Volcanoes, the largest recognizable volcanoes, are characterized by being short but very broad with low sloping sides. Cinder cones, the most common type of volcano in the world, are composed of large amounts of tephra, or pyroclastic debris. The last type of volcano is supervolcanoes. Supervolcanoes are the largest volcanoes.
A series of eruptions over the years have created what we know today as the magnificent Mount Vesuvius. To fully understand the wonders or the dangers of Vesuvius, one must first understand the inner structure and geological evolution of the volcano. Volcanoes are considered to be the Earth’s vents; they allow certain things such as molten rocks, and debris from Earth’s upper mantle to be released on Earth’s surface. Volcanoes get their mountain-like shape because the lava and ash that has been produced year after year collects and hardens. Over 1,000 volcanoes are either considered active, dormant or extinct.
The Devastation a Volcano Can Create Shown in In a Volcanoes Path The film "In a Volcanoes Path," was a good depiction of the devastation that a volcano can create. The movie also made me understand the importance of volcanologists. In studying the volcanoes maybe we can predict the next eruptions and therefore save many lives. On January 3, 1983 the most active volcano, Kileaua, that lives in Kalapana erupted in a big way. Lava was shot 1500 feet into the air releasing 100,000 gallons per minute and taking up 400,000 cubic yards each day.
The activity of the volcanoes varies , for example, Vesuvius will continue in a state of moderate activity for long or short time periods and will then become stagnant or in-active for months. If an eruption succeeds prolonged dormancy it will usually be fairly violent, as was the eruption of Mount Saint Helens after 123 years of stillness. The potential danger of an active volcano can be seriously threatening to civilization for more reasons than just the initial eruption of molten rock, disasters, such as mud flows, triggered by an eruption are also serious hazards. Composite cones are formed from a combination of eruptions. First the volcano will have an explosive eruption that ejects huge amounts of steam, gas, and ash.
In 1988, the explosions lasted from February to April, erupting continuously. And in 1992, it lasted from November 7, 1992 to August 14, 1993, one of Krakatoa’s longest eruptions. In 1992, the lava flowed one kilometer to the north, moving the shore 100 meters more northern than the former shore Krakatoa has caused much damage to the world, but what specifically has it done?
Pyroclastic flows have hot ash, rock fragments, and gas in them. These flows of hot ash, rock fragments, and gas are deadly because of their high temperatures of 850° C. Also they a... ... middle of paper ... ...nbsp; Resources USGS "Types of Volcanic Eruptions" Http://pubs.usgs.gov/gip/volc/eruptions.html USGS "MSHNVM and CVO" Http://vulcan.wr.usgs.gov/Volcanoes/MSH/ImageMaps/SWWash/swwash_map.html "MSH Map, Cross-sections, and Time-depth Plot" Http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/mshfigs.html "Simplified Eruptive History of Mount St. Helens" Http://vulcan.wr.usgs.gov/Imgs/Gif/MSH/Graphics/EruptiveHistory/msh_eruptive_stages.gif Edward W. Wolfe and Thomas C. Pierson, 1995, "Volcanic-Hazard Zonation for Mount St. Helens Washington, 1995": USGS Open-File Report 95-497 Http://vulcan.wr.usgs.gov/Volcanoes/MSH/Hazards/OFR95-497/OFR95-497.html "Encart Reference, Volcano, Types of Volcano" © 1993-2000 Microsoft Corporation Http://encarta.msn.com/find/concise.asp?ti=761570122&sid=20#s20 "Volcano," Microsoft® Encarta® Online Encyclopedia 2000 © 1997-2000 Microsoft Corporation Http://encarta.msn.com/find/concise.asp?mod=1&ti=761570122&page=3#s22vb Nas.N
For more than 100 years, scientists have sought to unravel the remarkable story of Crater Lake’s formation. Before Crater Lake came into existence, a cluster of volcanoes dominated the landscape. This cluster, called Mount Mazama (for the Portland, Oregon, climbing club the Mazamas), was destroyed during an enormous explosive eruption 7,700 years ago. So much molten rock was expelled that the summit area collapsed during the eruption to form a large volcanic depression, or caldera. Subsequent smaller eruptions occurred as water began to fill the caldera to eventually form the deepest lake in the United States.
About 74,000 years ago, Toba erupted and ejected several thousand times more material than erupted from Mount St. Helens in 1980. Some researchers think that Toba 's ancient super eruption and the global cold spell it triggered might explain a mystery in the human genome. Our genes suggest we all come from a few thousand people just tens of thousands of years ago, instead of from a much older, bigger lineage as the fossil evidence testifies. Both could be true if only a few small groups of humans survived the cold years following the Toba eruption. 5.