Cascadia subduction zone Essays

Alfred Wegener and Continental drift It was 1912, and one man named Alfred Wegener was studying a map. He believed that the world looked as though it were one big puzzle, and that the continents could fit together. Then he thought that maybe, a very long time ago, they did. He hatched up a hypothesis. Simply put, his hypothesis proposed that the continents had once been joined, and over time had drifted apart. When the continents were together, he called the supercontinent Pangea. In order

are responsible for every bit of land on this planet. Tsunamis A tsunami is also another natural disaster that can cause a lot of damage. It can be caused by an earthquake, landslide or a volcano. Tsunamis are mainly found in subduction zones. In a subduction zone the two plates meet and build pressure eventually the oceanic plate which is the heavier plate slides under the continental plate causing an earthquake. The earthquake shifts part of the ocean floor creating waves, however, gravity

Yosemite is one of the top ten most visited national parks which was established on October 1, 1890, making it the third national park in the United States. Since then over four million visitors come to the Yosemite Valley annually according to national geographic. Yosemite is sought to be a place for the people because it caters for many different types like hikers, photographers, adventurers and much more. Yosemite went through two geological stages, first off metamorphic rocks went through deformation

PLATES TECTONICS Plate tectonics is the scientific theory that attempts to explain the motion of the Earth’s lithosphere that have formed the landscape the landscape features we see cross the globe. The theory of the plates tectonics state that the lithosphere of the earth is build up from single plates that are broken down into dozen massive and tiny particles of solid rock. These pieces of plates move near each other on the peak of the earth more fluid lower mantle to produce various type of plates

Convection Currents The Alaskan Way Viaduct will collapse if an earthquake happens. Tectonic plates rubbing together causes an earthquake. What causes them to rub together? An earthquake happens through a sequence of cause and effect. Altogether, temperature, density, and convection currents work together to cause an earthquake. The layer of the Earth are made up of the lithosphere, asthenosphere, mesosphere, and the core. In the lithosphere, there is the upper rigid mantle, oceanic crust, and continental

The Samoan earthquake was located around the northern terminus of the Tonga volcanic arc where the trench has a sharp bend going west. The earthquake happened just east of this trench. The Pacific plate entered the subduction zone and made a steep descent downward, as the subduction is quite dense and old. This then resulted in faults near the Tongan Trench

I. Introduction I will discuss the geologic paradigms of uniformitarianism and catastrophism. Both theories shape the Earth’s surface, but are compared in different ways. Uniformitarianism theory details how things happen on and to the earth. Catastrophism theory believed that all things happen and change on earth due to major catastrophes such as meteorites impacting earth. The main question I will answer is how and when these two theories came about, and what makes these two theories different

2015). Volcanism is prominent at two types of plate boundaries, convergent and divergent. At convergent plate boundaries, two plates move towards each other, causing a slab of oceanic crust to descend below the continental plate into the mantle (Subduction), which will create a deep ocean trench. As shown in figure 2.1, this slab of crust drives deeper into the mantle, there will be an increase in temperature and pressure causing the material (water and carbon dioxide) within the slab to reach melting

process of subduction. When the two plates converge, the denser and thinner oceanic plate gets bent, or subducted, beneath the lighter and thicker continental plate. The magma rises, becoming lava when it reaches the Earth’s surface. When the lava cools, it forms rock. Over time, after several eruptions in which magma explodes to the surface when pressure in the Earth is released, the rock builds up and Aerial volcano is formed. The area where this happens is called the subduction zone. The crust

ABSTRACT The purpose of this article is to discuss 2010-2011 New Zealand earthquakes and the aftershocks, geological reasons of earthquake and various terminologies related to earthquake. The article also describes the Geology of New Zealand and how the geographical location makes the country Vulnerable to such disasters. Majorly the article discuss, the 2010 Canterbury earthquake and 2011 Christchurch earthquake, its Impact on Social and Economic structures of the country and its impact on the

According to the textbook, Alfred Wegner proposed the idea that the continents were drifting across the globe. He called this idea the continental drift. He had the idea that the continents were once together forming one big landmass named Pangaea. As Pangaea developed it caused the continent to break apart, and drift to their present locations. To be able to prove this idea however, he had to have evidence to show it was true. If I could travel back in time to help Wegner prove his idea to be true

the seismic waves that make the ground shake. When two plates are rubbing against each other, they stick a little. Most earthquakes occur along the edge of the oceanic and continental plates. Due to stress they shift and cause the earthquake. that zone is more subject to seismic disasters. Tectonic, volcanic, collapse and explosion, are the four different types of earthquakes. A tectonic earthquake is one that occurs when the earth 's crust breaks due to geological forces on rocks and adjoining

Physics Lab Report Name – Shaurya A Singhal I.D – 13229 Grade – 12 Investigating the effect of the angle of incidence on the diameter of a Crater formed by a falling object Introduction When a bob is dropped into sand, a circular crater is formed due to the impact of the ball. The size of the crater varies with numerous factors, Mass of falling object Angle of incidence Velocity of object Rigidity and Tensile Strength of surface on which object falls Background Theory When a high-speed object

The other part of the Earth consists of rigid plates which is called the lithosphere plates. They are moving relatively to each other. The moving of lithosphere plates is called plate tectonics. The idea of plate tectonics begin in 1600. Little significance was given to this notion till 1915 when Alfred Wegener, Germany meteorologist and geophysicist wrote a book entitled The Origins of Continents and Oceans. He had read about the similarities in the American and European fossils and become interested

The Earth’s crust has several moving pieces. They are composed of a variety of igneous metamorphic and sedimentary rocks. The tectonic plates are always colliding or pulling apart, creating mountains. Earthquakes and volcanoes occur at the edge of these tectonic plates because of the impact of the plate movements are greatest there. What would be interesting is what if plate tectonics never existed? What would be the social, economic, climatic impact of living without plate tectonics? Without

The resurrection of oceanic dispersal in historical biodiversity. by Alan de Queiroz. The distribution of many taxa that are separated by oceans can be explained by either vicariance or oceanic dispersal. At first oceanic dispersal was the explanation used for the distribution of taxa separated by oceans. Since the 1930s till the 1960s time oceanic dispersal was the most common explanation because there were many plausible dispersal mechanisms that would make oceanic dispersal possible. Support

Earthquakes affect many people worldwide. An earthquake occurs when the earth begins shaking and releases energy in earth’s lithosphere that creates seismic waves. CDMX gets most of its seismic activity from the Cocos and Pacific plates sliding against and under the North American Plate, making it one of the most active trenches in the world. Mexico City, which sits through the San Andreas fault, was hit by a major earthquake on September 19, 1985. Mexico City’s population was roughly 77 million

Geologic features. The martian geology is different than Earth in many ways when it comes to the soil and the plate tectonics. Red soil. Mars is called the red planet for a reason. The soil on Mars is rich in magnetic iron oxides which is rust. Scientists took a soil sample that mimics that of Mars and tested it to see if it would rust the way it looks like on Mars. The iron was unchanged after a year in a dry atmosphere and finally changed when the sample was put in a wet atmosphere. (R., 2005)

Millie Newton Miss Amiat 22 February 2018 Plate Tectonics definition of plate tectonics Plate tectonics is the study of the structure of the earths crust & mantle with reference to the theory that the earths lithosphere is divided into large rigid blocks that are floating on semi fluid rock and are thus able to interact with each other at their boundaries and to the associated theories of continental drift and sea floor spreading. There are a few handfuls of major plates and dozens of minor

• I want you to stop for your second and look at the person sitting next to you. What you are looking at is the fine result of over 200 thousand years of evolution; the master piece of natural selection, and a perfectly adapted organism to life on earth. • But with exponential grow in technological advances, unpredictable climate change or even space exploration. Have you ever stopped for a minute and tried to imagine how Humans will look like in 1000 years? Central Idea/Preview Statement: •