Do all volcanoes form at subduction zones? There are many different types of volcanoes and many different ways they’re formed. Some of the plates diverge away from each other forming volcanoes in the middle of them, or also through convection. Subduction volcanoes are formed from one tectonic plate moves under another tectonic plate down into Earth’s mantle. The Ring of Fire is an example of many volcanoes formed by subduction. It is the most volcanically active belt on Earth, surrounding the Pacific Ocean. These volcanoes occur from two converging on one another, one of those being oceanic. The oceanic plate bends beneath the continental plate going into Earth’s mantle creating a trench. The deepest trench is 11 kilometers below sea level, known as the Mariana Trench. The picture on the right shows the Aleutian Trench where subduction volcanism was formed. As the trench is formed down in the mantle, the oceanic plate heats up and rises with sediment forming magma, the magma rises up through the over- lying plate to erupt at the surface. As that plate being a continent it formed a chain of volcanoes as the Ring of Fire. The Ring of Fire contains 452 volcanoes, over 75% is active. It stretches through North America, South America, Japan, into New Zealand and across Bering Strait. Mount Ruapehu in New Zealand is one of the most active which erupts about every 50 years.
Another type of formation of volcanoes is spreading center volcanism, which occurs at mid- ocean ridges. That is where two plates diverge away from each other, opening space between them. As the plates pull apart hot magma rises from the mantle forming magma chambers, where the magma will erupt to the surface from there. Also the high heat from mid-ocean ridges will form hydrothermal vents, which form from water seeing down and is heated from the rocks lying on the magma chamber. This hot water on surface contains lots of silica and numerous metals from lava. An example is the Iceland plume which was said to have seen the earliest volcanic rock about 56-60 million years ago.
Volcanoes can also be formed from Interplate (hotspot) Volcanism or Convection. These are active sites of volcanism within plate interiors, these hotspots are from hot mantle in a mantle plume which is generated in the lower mantle and
Marisol Sanchez-Matias March 7, 2015 AP US History Reconstruction is referred to the period in the United States history immediately following the Civil War in which the federal government set the conditions that would allow the rebellious Southern States back into the Union. The Thirteenth, Fourteenth, and Fifteenth Amendments were reconstructed Amendments to the United States Constitution. The Thirteenth Amendment is that neither slavery nor involuntary servitude, except as a punishment for…
Thomas Jefferson (April 13 [O.S. April 2] 1743 – July 4, 1826) was an American Founding Father, the principal author of the Declaration of Independence (1776), and the third President of the United States (1801–1809). He was a spokesman for democracy, and embraced the principles of republicanism and the rights of the individual with worldwide influence. At the beginning of the American Revolution, he served in the Continental Congress, representing Virginia, and then served as a wartime Governor…
October 14th Dear Jamal, Hello Jamal. My name is Ryan and I am currently learning about how Africanisms have affected our American culture today. Africanisms are different cultural characteristics that you have like food, dance, language, and the many other cultural categories. Your foods cultural have greatly influenced American culture today. Many things that we do today has come from your culture like deep frying. Deep frying foods is a big one because deep frying things like chicken and…
Renaissance and it had a ton to do to push forward with technology and modern day society. One celestial discovery prevailed that help us find where we are in the universe is Nicholas Copernicus findings in document one. In this document it states “those who keep the earth at the centre of the world are force to do” This quote is explaining gravity and what holds us in place in space. Also in this document it states “infinite multitude of spheres” in this quote it means that he is finding out about…
his people as a tribal chef during years of resistance to American government policies. Ghost Dance: religious movement incorporated into Native American belief systems. Wounded Knee: a brief fight between the Native American Lakota people and the US army at Wounded Knee Creek in South Dakota on December 29, 1890. Tuskegee Institute: black educational institution founded by Booker T. Washington to provide training in agriculture and crafts. G.W. Carver: attacked Booker T. Washington because Washington…
AP History Notes Culture – a way of living Ethnocentricity – when you think your culture is better than other Imperialism – imposing your will on weaker countries Military Economic Cultural Slaves The first Africans were indentured servants Bacons rebellion Bacon’s POV Bacon wanted more land Bacon went to war because he did not get what he wanted He slaughtered Indians for land Indentured servants They were not treated well Had to work for passage across the ocean…
Although New England and the Chesapeake region were both settled largely by people of English origin, by 1700 the regions had evolved into two distinct societies. Why did this difference in development occur? there were social economic and political differences between the 2 regions social chesapeak: people came to this region for money. They set up plantations and made profit from cotton. individuals settled this area New england: people came to this region in families. They (puritans) were…
AP U.S HISTORY SUMMER ASSIGNMENT 2014 Massachusetts a. Year settled: 1620 b. The original settlers were refuges from Europe searching for a place where they could practice whatever religion they wanted freely and without consequence2 c. The main religion was puritan2 d. They didn’t really tolerate other religions because they wanted everybody to worship the same god so that society would remain stable and without conflict.2 e. The settlers made money from trading/bartering or they could…
Naomi Bracho A.P U.S HISTORY PD 2 HW#12 1) Describe and explain the growth of Mass Democracy in the 1820s. Andrew Jackson, Henry Clay, John Q. Adams and William Crawford were the main candidates in the election of 1824. None of these candidates won the electoral votes. Henry Clay was eliminated from presidency but, he supported John Q. Adams due to his strong dislike towards Andrew Jackson. Adams agreed to make Clay the Secretary of the State because he helped John Q. Adams into…
Uplinga Review Articles of Confidn (aoc)- 1st attempt at unified nat gov Proposed-1777 Bridget Henry Lee-“ reserved to be right” colonies should write new constit (AoC)- committee (led by John Dickenson) Prevented from Ratifying (4 Years) land locked states did not have land to left gave states huge advantages (own view) smaller states (led by Maryland)- will not ratify unless get western territories Result: Maryland would vote to ratify it- western land claims given to cong simple…