Sea floor spreading forms the best evidence for continental drift. Critically discuss this statement. There is lots of evidence to support the theory of continental drift, including Harry Hess’s discovery of sea floor spreading theory. By using sonar, Hess found that oceans were shallower in the middle, allowing him to identify Mid Ocean Ridges. He suggested that at the centre of oceans, molten material would rise from the Earth’s mantle, causing new sea floor to be created, pushing the ocean floor.
If this water contains amounts of silica when it flows through, the mineral quartz is formed in its place when it reacts with oxygen and is left over time. This combination of quartz and phyllite is seen in figure
Are You Fracking Serious? Teri Hensley Everest University EVS_1001 Definition for Posterity hy·drau·lic frac·tur·ing noun noun: hydraulic fracturing 1. the forcing open of fissures in subterranean rocks by introducing liquid at high pressure, especially to extract oil or gas. Natural Gas and How It Differs From Other Fossil Fuel Natural gas is a subterranean fossil fuel often found in massive deposits. The most immediate and significant detail that distinguishes it from other fossil fuels is that it is only in liquid form due to the geological pressure. Less relevant to the intention of this paper are it's differences in chemical composition and it's geographic conditions of occurrence.
Hydraulic fracturing, or “fracking,” is a method of harnessing energy by drilling beneath the surface and releasing gas from shale rocks. Workers do this by injecting a mixture of chemicals, sand and water into the ground under high pressure, causing the rocks to explode. The shale gas then rises out of the well, similar to how an oil rig works (BBC News, “What is fracking and why is it controversial?” 1). However, fracking causes a huge problem with the environment, especially fresh water for sustaining life. The harmful effects of fracking need to be stopped, but only if we understand what damage occurs during this process so that we can come up with solutions to save drinking water.
| Since that time, some additional work has been done on veblens, and we understand them a little better. As I said, they are hills of sand or gravel that were deposited by relatively forceful upward flows of groundwater. The upward water flows had to have been with sufficient force to transport fairly coarse materials, in some cases rocks up to 3 or 4 inches in diameter. The only other geologic features that might be mistaken for veblens are glacial hills known as kames. However, kames consist of gravel and sand deposited by streams that flowed into holes in the glacial ice, depositing sediment in the holes.
The geology of Yosemite is mainly consisting of rocks and waterfalls. The main rocks are granitic rocks and metamorphic rocks. Ice Ages were the main causes for Yosemite Park or should I say California because the Ice Ages brought glaciers that carved out California. In Yosemite Park, it shows how the glacial have move and creating Yosemite Lake too. It created a lot of homes for the animals that are living in the park and became big attractions for visitors all around the world.
The procedure consists of injecting a special fluid made up of chemicals and sand into the ground at high pressures to squeeze the natural gas back up through the rocks. By injecting this certain fluid we are leaving mercury, lead, hydrochloric acid, methane, and other poisonous chemicals left to rest in our earth’s crust. Studies show that more than 90% of fracking fluids are left underground. Because we are permanently polluting our land we are putting our environment at high risks of becoming destroyed and it is effecting human health. One resource that is at high risk of being contaminated due to fracking is water.
I am particularly interested in data analysis and data modeling of bodies of waters as they become ever scarcer and more polluted in populated urban areas. While earning my B.S. in environmental science at the University of XX, I had the opportunity to work for my academic advisor as an environmental research aide. It was there where I found my passion for environmental work and water resource management. I gained valuable hands-on field experience analyzing and studying the pollution of microplastics in the Puget Sound of Washington state and studied nutrient cycling in alpine and urban lakes.
Enis Davud 2/6/13 Mrs. Laird Earth Science Frack Attack! Off shore drilling or conventional drilling is used most often to extract natural gas. However a fairly new form of drilling has evolved called hydraulic fracturing or hydrofracking. Hydrofracking’s main purpose is to open up shale deposits filled with natural gas that are unable to be attained using normal drilling. The process of hydraulic fracturing is complex and has many effects on the economy, environment, and the workers.
However, I have met many people that dislike the process very much. Below one will find the answer to what fracking is, why some people think that it is important to use fracking, and what about the process concerns so many people. Fracking is also known as hydraulic fracturing. “Hydraulic fracturing is the process of creating fissures in underground formations to allow natural gas to flow.” (Barnett Shale Energy Education Council) Fracking extracts oil and gas from layers of rock formations deep beneath the earth’s surface. Sometimes, the wells can be thousands of feet deep.