ENG 201 : 8:00
Assignment 1: Natural Science
Ocean Inside the Earth's mantle
The mantle takes up 84 percent of the Earth's structure and is composed of my different layers. Knowledge of the upper mantle is that it includes tectonic plates, magnetic pull, heat flow, and gravity studies. A new discovery has been made and scientists have discovered an ocean on the Earth's upper mantle near Asia as big as the Arctic ocean. This proof was found as a seismic wave diminishing into the Earth's mantle during earthquakes. Researchers estimate that up to 1 percent of the rock sinking down into the Earth's mantle, in the part of which is water, works out to be what the Arctic Ocean is worth (Than printout1). Water in the Earth's mantle has been known to be very important to the development of the earth due to its tectonic plates. Earthquakes are formed because of these plates shifting. When there is water in the mantle, these waves will become less stressed and thus making this a new discovery of the new “ocean”. Seismologist Micheal Wysession discovered this new ocean by analyzing more than 600,000 seismograms. Wysession noticed the waves on the siesmograms began to diminish in one area beneath Asia. Traditionally, seismologists employed a sort of CAT scan by measuring the speed of seismic waves (Anitei printout 1). “Water slows the speed of the waves a little”, Wysession explained. “Lots of dampening and a little slowing match the predictions for water very well” (Than printout 1). Predictions were evaluated stating that a cold slab of the ocean floor could have sank miles into the Earth's mantle leaving the hot temperatures of the mantle to evaporate water stored in the rocks. When the water rises it appears to be a solid formation but the composition of rock in the ocean is said to be 15 percent water. This is very accurate, but Wysession points out that it is “A real back of the envelope type of calculation”(printout 2). Wysession has...