Plate Tectonics Ever since the beginning on time, Humans believed the ground is solid and immobile. But this is not true whatsoever. The Earth is every-changing and continually in motion. The stability of the Earth is not at all what we think it is. Thinking about the rotational axis of the Earth, and possibly of what the Earth may become at a certain point in time, has a great influence on understanding all aspects of living things, either in the past, present, or future. The Theory of Plate tectonics is accredited to most of the creations of Mountain Ranges, the Centennial drifting Theory, for earthquakes, and volcanic activity. Plate tectonics and mountains also play a big part in the Earth and its geological features. Geophysics, which studies the physics of the Earth, has led to many important findings about the Earth and how it is made. Seismologic studies of planet Earth have revealed new information about the inside of the Earth that has helped to give new openings to plate tectonic theory. Due to geophysical studies, we now know that the Earth is made of several significant layers. Each one of these layers has its own properties. The crust is the outermost layer of the Earth. The crust is made up of the oceans and continents. The crust has a fluctuating thickness, being thirty to seventy-five kilometers thick in the continents and ten to fifteen kilometers thick in the ocean basins. The crust is made up mainly of alumino-silicates (Fowler p472). The layer underneath the crust is the mantle, which is made up mainly of ferro-magnesium silicates. The mantle is approximately two thousand, nine hundred kilometers thick, and is separated in to the upper and lower mantle. It is in the mantle where most of the centralized... ... middle of paper ... ...sts believe that the North and South American plates are moving westward at approximately two to three centimeters per year. Based on the recordings of the earthquake, the Haitian quake seems to have occurred close to the Enriquillo Fault. The Enriquillo Fault is a big strike slip fault that runs across the southern border of Haiti. Scientists presume this is the fault that most likely ruptured because it is closest to the epicenter of the rupture. Although this was a big catastrophe for human life on the island of Haiti, it was not really unusual given the plate tectonic activity in that area. Unfortunately for Haiti, it is one of the most poorest and underdeveloped countries in the world. Its government was not really in the position to have any preparations in line for such a huge earthquake, and this caused thousands of people lost their lives (Kearey 2009).
The Mantle makes up 70% of the Earth’s mass and is mostly solid but capable of flow, causing changes in the Earth’s surface.
Earthquakes are a natural part of the Earth’s evolution. Scientific evidence leads many geologists to believe that all of the land on Earth was at one point in time connected. Because of plate tectonic movements or earthquakes, continental drift occurred separating the one massive piece of land in to the seven major continents today. Further evidence supports this theory, starting with the Mid-Atlantic ridge, a large mass of plate tectonics, which are increasing the size of the Atlantic Ocean while shrinking the Pacific. Some scientists believe that the major plate moveme...
Earthquakes play a major role into understanding the composition and materials that exist within the Earth (Merali and Skinner, 2009, p.252). Earthquakes are the main source of insight into the inner workings of the earth, due to the nature of the seismic waves they produce. P and S waves are reflected and refracted at different boundaries within the earth, and this enables seismologists to make inferences about the internal composition and structural of planet Earth. (Merali and Skinner, 2009, p.252).
The Haitian government’s lack of preparedness for earthquakes despite the fact that earthquakes are common to the region is indicative of the governments inability and lack of resources to properly plan and protect it’s population against natural disasters. This lack of preparedness is not an isolated incident. Prior to the disaster, the World Bank and others were working with the Haitian government to incorporate disaster risk management into Haiti’s development strategy and to develop its capacity for disaster response. This capacity building was in its early stages of development when the earthquake hit, on January 12, 2010, and was mainly focused on hurricanes, which are the most common cause of natural disaster on the island (Margesson, 2010, p. 4).
The traditional theory about the Earth’s core suggest that the core of the Earth is a solid nickel and iron sphere surrounded by a fluid metallic magma. The rotation of the Earth is believed to create massive columns of magma to swirl in the core. These columns are believed to produce the Earth’s magnetic field. This theory is based on the assumption that the Earth’s core is cooling and will eventually cool completely and cease to produce energy and a magnetic field. However, this theory does not answer many ongoing mysteries about the Earth, such as why the Earth’s magnetic field periodically shuts down, and questions about the energy production of the Earth. It was apparent that a new theory was needed to explain the mystery of the Earth’s core.
Since the rocks are from the Earth’s crust, a natural deduction is that the rock sample shares a similar chemical composition. The Earth’s crust predominantly contains silicon and oxygen which bond together to form a group of minerals known as silicates (SiO4). A tetrahedral chemical structure indicates a crystal-like structure. Silicates often bond with other cations such as iron, magnesium, sodium, aluminum, potassium, and calcium which gives rise to new physical and structural properties (“Earth121: Minerals (Part One)”
Currently, almost two years ago Haiti was struck by a 7.0 magnitude earthquake. It sparked an international urge to help aid and relieve Haiti of its catastrophe. Not only governments in various countries reached out, but independent organizations as well. This disastrous event showed how the world could come together when their neighbor is in need. But prior to this 2010 earthquake, Haiti was already facing devastation other than a natural one - societal.
Inside Earth, there are three main layers. One of the layers inside Earth is the crust. The crust is the outer layer (of the three layers), and is only 5-70 kilometers thick. This layer includes dry land and ocean floors. Another layer is the mantle. The mantle is the second layer, and is made of solid, hot rock. This layer is 3,000 kilometers thick, and has three layers. Finally, the last layer is the core. The
The Haiti earthquake that occurred on January 12, 2010 just fifteen miles south of the Haitian capital of Port-au-Prince was a severely large-scale earthquake, at a magnitude of 7.0. The initial shock was then followed by a series of aftershocks with magnitudes ranging up to 5.9. Over three hundred thousand people died due to this extreme chaos. Many buildings collapsed and disintegrated under the force of the quake; both the cathedral and National Palace in Port-au-Prince were heavily damaged. In the aftermath of this tragedy, efforts to aid the people of Haiti with medical assistance, water, and food were hampered by the loss of communication lines as well as by roads blocked by debris. Over one million people were left homeless due to this quake. Two days after the earthquake, journalist Leonard Pitts wrote “Sometimes the Earth is Cruel,” an article describing how the people of Haiti responded to the disaster. In “Sometimes the Earth is Cruel,” a major theme is that some things are inevitable.
An earthquake of magnitude 7.0 hit the island of Haiti on January 12, 2010, killing anywhere from 100,000 to 300,000 people, injuring another 300,000 others, and leaving over 1.5 million without homes (Fleddermann, 2012, p.116). The majority of the destruction and human toll occurred in Port au Prince, the capital city of Haiti, although the effects of the earthquake were spread throughout the island. Aside from the many people who died, were injured, or left homeless, those involved in this disaster are the Haitian government, the United Nations, civil engineers, the press, relief organizations, and the United States. Although initially perceived as simply a natural disaster, it becomes apparent through further research that the degree of loss experienced might have been lessened if certain procedures and codes were in place and followed to increase the safety and integrity of the buildings in Haiti.
The effects caused by earthquakes are devastating. They cause loss of human life and have effects on infrastructure and economy. Earthquakes can happen at any time anywhere. In January 12, 2010 an earthquake of a magnitude of 7.0 hit the nation of Haiti. An estimation of 316,000 people were killed, and more than 1.3 million Haitians were left homeless (Earthquake Information for 2010). Haiti was in a terrified chaos. After the earthquake, families were separated because many of the members were killed. Homes, schools, and hospitals were demolished. People lost their most valuable belongings. It will take time for the country to recover from this terrible disaster. The long damages are economic issues, health-state, and environmental issues that effect in the beautiful island of Haiti.
The Magnificent North American Tectonic Plate Even though other global problems are bigger than Plate tectonics, the North American Plate took many years to form, is very divers, and is purely magnifect because a big part of our everyday life and the plate tectonic theory is one of the oldest theories known to man. There are also many different aspects to the North American Plate. There are regular basic facts about the plates, there are specific scientists that gathered and founded information about this plate and many others. There is the location of this plate and the plates surrounding it. There are multiple different types of boundaries that surround this plate.
The outside of the earth is a thin crust which is approximately 20 to 40km
Earth was formed 4.8 billion years ago (3) . It became the home for hazelnuts because it had an atmosphere and environment which allowed for life to prosper in later years. Earth’s surface was once composed of a single landmass, known as Pangaea (1).Over time it was broken up into seven different plates which were free to move as a result of movements in the hot, semi-liquid magma beneath the...
The field of geology has many different branches. Some of these areas have hardly anything in common. The one thing that they all include, though, is that each one concentrates on some part of the Earth, its makeup, or that of other planets. Mineralogy, the study of minerals above the Earth and in its crust, is different from Petrology, the st...