Cascadia subduction zone

Patrick Johnson Engr 597 Tectonics Dr. Gifford 10/14/2016 Formation of the Rocky Mountains Abstract • How did they form? • Sevier orogeny • Laramide orogeny • prevailing theory (flat slab subduction) 1. Very low angle subducting slab 2. rubbing against underside of North American plate 3. first proposed by william dickinson (1978) 4. another good paper Peter Bird (1988) • Alternative theories 1. Craig jones - suction model 2. (maxson, Tikoff 1996) - Hit and run collision model "I 'll come…

The quake was capable of igniting raging fires, which broke out in the city and lasted for several days. The flames were quick to spread due to electrical lines and ruptured gas lines. It is estimated that up to 90% of the total damage was the result of the subsequent fires that burned uncontrollably (1906 San Francisco Earthquake and Fire). San Francisco was utterly destroyed. Around fifty different fires began fuming in San Francisco, and eventually coalesced into a grand firestorm that…

Unlike the East coast, the natural disaster that is most common in the West coast is earthquakes. As common as earthquakes are, there are only so much we know about the elements involved; such as fault lines. The topics discussed are what and where earthquakes occur, its history, and earthquake preparation in California. Earthquakes are known worldwide as a shaking of the ground. However, this just how people see the phenomenon where destruction follows. According to Christopher Scholz and his…

Oklahoma County has not been really active. Before the earthquake swarm started in the Jones area, there was only 7 earthquakes per year in Oklahoma County. But, since the Jones swarm started, there are a few hundred earthquakes per year. And, since January 2009, eastern Oklahoma County has been shaking off and on. Most of the quakes are around Jones, Oklahoma. The Oklahoma Geological Survey was interested in the 10,000 percent increase in seismic activity. Austin Holland, a seismologist for the…

Mexico City is the most popular metropolitan area in the western hemisphere. Mexico City is the really warm but it get’s really cold in the winters. It’s considered to be the safest part in Mexico. Mexico City is the largest popular area in Mexico(Wikipedia). Mexico City is the southern end of the plateau of Anahuac(Wikipedia). Mexico City is located in Mexico, and Mexico is in North America(Wikipedia). Mexico City has a lot of landforms such as Mexican Plateau‎‎, rivers of Mexico City,…

Volcanoes can destroy the land all around them. There are volcanoes all around the world, some may be dormant then may become active. There are some volcanoes that destroyed all of the living things around them, such as, Vesuvius, and Mt. St Helens. Some volcanoes are very different from the others. There could be different ways a volcano could erupt. Vesuvius and Mt. St Helens both destroyed a great amount of land around them. Furthermore, the two volcanoes caused Earth quakes. In addition,…

ridges and moves away from ridge axes with a motion like that of a conveyor belt as the newly formed lithosphere crust fills in the cracks or rifts. To assist the process of the newly-created lithosphere, oceanic plates return to the mantle at subduction zones, in which one plate bends and slides underneath the other, curving down into the mantle so the surface area of the Earth remains constant. In other words, seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic…

In 1912, German meteorologist Alfred Wegener proposed the theory that all the continents were once all one continent and then later drifted apart and separated leading to the seven continents we have today. He thought that 200 million years ago there was one large continent that he called Pangea, which means “All-Earth.” During the Jurassic period the continents were believed to break up into two smaller continents which were called Gondwanaland and Laurasia. The continents were breaking into…

The topic of this discussion is to explain why Africa and South America are moving apart. The drifting apart of Africa and South America has to do with the theory known as the theory of plate tectonics. Based on this model, the crust the coolest part of the mantle, make up Earth’s strong outer layer, known as the lithosphere. Right beneath the lithosphere is the asthenosphere, the hottest part of the mantle. Rocks at this depth are very near the melting temperature, and respond to forces by…

Plate tectonics is a theory about how the plates are constantly moving on top of a layer of magma that is constantly taking in old crust to recycle it this constant movement causes earthquakes, tsunamis and other geological events. The movement of the Pacific and North American plates cause the old sea floor to be replaced by the now wider North American plate. Also with the movement the continental plate was stretched as the Pacific plate pulled the continental plate to the northwest which…