7. The most recent major eruption of Mount Saint Helens was May 18, 1980. The eruption was so large, the whole north face of the volcano slid away. I can tell it was the north face, because the compass points north and that is where the face slid away. This eruption was an explosive eruption.
The largest shield volcano in the solar system is Olympus Mons, on the planet mars. Composite volcanoes can be identified by their symmetrical, wide-based shapes that consists of alternating layers of lava and cinder. Unlike any other type of volcano the composite volcano consists of both lava and cinder. The cone of a composite volcano is much steeper than the lava dome of a shield volcano. The cone of the volcano is formed partly by explosive eruptions of cinder.
They can cause widespread destruction, such as the 1980 eruption of Mt St Helens. Lahars are a secondary effect of a volcanic eruption and are cement-like mudflows consisting of volcanic ash and water. They often occur in the days following an eruption when people are at their most vulnerable and with the capacity to travel up
Due to high temperatures in the mantle of around 3000 degrees centigrade, this oceanic crusts melts and then rises due to the convection currents in the aesthenosphere . As it joins with trapped seawater and sediment, it melts the overlying continental crust, and the magma plumes rise to the surface. They contain more silica so are more viscous, which plugs up the volcano, meaning pressure build up. This is why these volcanoes are so explosive. Another type of plate boundary are constructive, which is the margin between two diverging plates where new magma
The highest temperature ever recorded in the United States was 134 degrees F at Greenland Ranch in Death Valley, California. 19. In 1899, it was so cold that the Mississippi River froze over its entire length. 20. The United States uses an estimated 10 million tons of salt each year to melt ice on the roads.
The Chilean civil aviation authority said that "the tip of the cloud that has travelled around the world has more or less reached the town of Coyhaique", about 600 kilometres south of the Puyehue-Cordón Caulle. An estimated one hundred million tons of ash, sand and pumice were ejected – requiring power equivalent to 70 atomic bombs. Eruption The Southern Andean Volcano Observatory of Servicio Nacional de Geología y Minería de Chile reported on 27 April 2011, 15:30 local time, an increased seismicity at the Puyehue-Cordón Caulle and set the alert Level to 3, Yellow. Between 20:00 on 2 and 19 June: 59 on 3 June, OVDAS
Where is the park located and what are its' dimensions? The base of the Cascade Range was constructed as the Earth's crust folded and uplifted, pushing the seas westward. Molten rock pushed toward the surface, creating both violent eruptions and forcing an incredible amount of lava upward through enormous cracks. Within the past 750,000 years these explosive eruptions built a string of volcanoes on this plateau base. This Cascade Range of volcanoes extends from Canada's Mount Garibaldi to Lassen Peak in northern California.
DEMONSTRATE UNDERSTANDING OF A SIGNIFICANT EVENT IN THE CLASSICAL WORLD In the year 79 AD, a mountain in Italy called Mount Vesuvius erupted, the eruption is one of the most catastrophic and famous of all time. Surrounding Roman cites; Pompeii and Herculaneum, which were two densely populated towns located in the Bay of Naples were obliterated by the eruption. It is not known how many people the eruption killed. LOCATION OF THE AREAS AFFECTED BY THE ERUPTON This map shows the cities surrounding Mount Vesuvius, Pompeii, Stabiae, Oplontis and Herculaneum which were all destroyed during the eruption. This map also shows the area of the smoke plume from the eruption.
Pompeii Sivanithursan Vettivel Pompeii, once a great roman city, now a tourist site frozen in time by the ashes of mount Vesuvius. The fate of Pompeii was sealed in a matter of days. It began with the eruption of mount Vesuvius on late August of 79 AD. This was followed up by 1.5 million tons of volcanic ash and rocks per second which piled up on top of the city and killed thousands. Now Pompeii is a time capsule and a tourist cite.
When the source of hydrogen in the Universe is exhausted, all the stars will burn out and die. 3. The gravity of the Universe may become so great that it will bring all matter in the Universe back together and the Universe will collapses into black holes. 4. It is, therefore, true to say that everything that exists in the Universe is not permanent.