Essay On Valles Caldera Volcano

They stretched from the southern tip of South America, along the coast of North America, across the Bering Straight, down through Japan and into New Zealand. What some people did not know is that The Ring of Fire actually has two other names to go along with it. One is called “Circum-Pacific Belt”, and the second is “Pacific Ring of Fire.” Some of the biggest volcanic eruptions has happened along The Ring of Fire. It also, contains some of the largest volcanoes and mountains in the world. One example is Mount Saint Helens.

Volcanoes have played a key role in forming the face of the earth as we know it today. Some of the most well known landmarks and locations in the world are volcanoes. From the Hawaiian Islands to Mount Vesuvius, the Earth is populated with hundreds of active and dormant volcanoes. Among these volcanoes there are multiple different types. Stratovolcanoes, the most dangerous type of volcanoes, are built by multiple eruptions over many years.

After significant time, the hard lava forms a volcanic mountain. Volcanoes can form in many different sizes and shapes. They can look like a cone, have steep looking flanks, or look as if they were long cracks in the earth’s crust. (Plummer et al., 2000). If the mountain is very tall, then there is a greater chance that it was formed from past eruptions.

Volcanic ash is also significant in the volcanology, differing slightly with each eruption. Different eruptions possess different properties, such as composition and thickness of the erupting magma, the force of the eruption, and what gases are present, that make each eruption unique (3). Magma In order for a volcanic eruption to occur, a substance known as magma must be present. Magma often collects in magma chambers (directly below the volcano) that feed a volcano. Magma consists 96% of molten, or liquid, rock, due to the extremely high temperatures (1300 °F to 2400 °F) located in the Earth’s mantle(4).

Fissures Small and long cracks on the sides of a volcano. Hot Spot The centre of a volcano that is usually 100 to 200km across and has been going on for tens and millions of years, meaning that there is still a consistent rise of hot mantle material inside the volcano. Lava Lava is basically magma that has arrived to the surface of the earth after a volcanic eruption. This is usually used to describe liquified rock that comes from a

Volcanoes are magnificent and powerful land features. The magma erupts from the Earth forming islands, cooling to form rocks, and changing the landscape on eruption at a time. They can erupt at any time! Since volcanoes are dangerous we have developed technology to detect these impressive explosions. Since Hawaii was formed by a volcano when you visit Hawaii you are standing on cooled lava!

Subsequent smaller eruptions occurred as water began to fill the caldera to eventually form the deepest lake in the United States. Decades of detailed scientific studies of Mount Mazama and new maps of the floor of Crater Lake reveal stunning details of the volcano’s eruptive history and identify potential hazards from future eruptions and earthquakes. Mount Mazama was formed over a period of nearly half a million years by a succession of overlapping volcanoes. The first eruptions about 420,000 years ago built Mount Scott, located just east of Crater Lake. Over the next several hundred thousand years, Mount Scott and other nearby volcanoes became extinct, while new volcanoes grew to the west.

There are also more explosive volcanic eruptions in which the gas pressure builds until it is extremely high and the viscuous lava can no longer stand i... ... middle of paper ... ...because these volcanoes are located in different areas of the world or because El Nino occured during the year of the eruption of El Chichon. All of these evidences are still being compiled and scrutinized in order to verify the true relation between volcanic eruptions and climate change. Works Cited: Angell, James. "Stratospheric Warming Following Volcanic Eruptions." http://capita.wustl.edu "The Effects of Volcanic Eruptions on Earth's Climate."

Volcanic Eruptions and Global Climate Change Abstract There has been much debate in recent decades over how much volcanic eruptions contribute to global climate change, the destruction of the ozone layer, and global warming. This electronic term paper deals with various sides of this debate. There will be a specific focus on the great nineteenth century eruptions of Tambora and Krakatoa. Table of Contents Introduction The Effects of Volcanoes on the Earth Systems in General The 18-- Eruption of Tambora and its Effects on the Earth Systems The 1883 Eruption of Krakatoa and its Effects on the Earth Systems Why Some Scientists are Saying that Volcanoes Do Not Have a Great Effect on Global Change Conclusion References Introduction Since the beginning of time, volcanoes have been erupting on Earth. Millions of years ago, they created the continents, and the gases they produced condensed in the atmosphere to rain and form the oceans.

The next eruption could easily be predicted many weeks or months before an eruption, giving people time to evacuate the continent. Though possible, scientists are starting to believe there will not be another eruption in the foreseeable future. The eruption is not overdue as many believe, but if it happened, it would cause a large change in global weather patterns, change our lifestyle, and have a large impact on agriculture, impacting food sources. The park is safe to visit, but the volcano is still active. I learned very great information from these articles, and I now have a better knowledge of Yellowstone’s supervolcano.