transport metals‚ 2) openings in rocks which allow permeable flow of hydrothermal fluids and the metals that they transport in solution‚ 3) available sites within the fractured rocks which allow for deposition of the minerals from solution‚ and 4) the requisite chemical reactions that contribute to that deposition (Bateman‚ 1967). Before any of these factors come into play‚ however‚ there are tectonic processes that must happen to set the stage for development of copper porphyry deposits. Subducting tectonic
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Earth History (Geological Timeline) Lecturer Dr. Sameh Abu El Soud History of Early Geology Catastro‐phism Tries to explain the presence of everything on earth and their composition by catastrophes. E.g. A catastrophe happened to dinosaurs 80 million years ago. A comet fell on earth surface leading to volcanoes‚ leading to dust clouds in the atmosphere‚ preventing solar rays penetration ‚ the plants died and then the dinosaurs. Uniformi‐tarianism (James Hu on‚ late 1700s) ‐ He proposed that the
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Atherosclerosis A number of ageing changes occur in the aorta‚ arteries and arterioles. The age related changes that occur in muscular arteries are usually known as arteriosclerosis. It involves alterations of the smooth muscle hypertrophy and intimal fibrosis further reducing the diameter of the vessel. Atherosclerosis is the most common arterial abnormality known as arteriosclerosis which is defined as the stiffening or hardening of the artery walls. However‚ atherosclerosis refers to the hardening
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ENVIRONMENTAL AWARENESS “The Earth provides enough to satisfy every man’s needs‚ but not every man’s greed.” – Mahatma Gandhi. The ‘Environment’ is a term used to represent an entire systems‚ geology‚ and climate. An Environment can be any scale‚ including global‚ regional‚ local‚ and even down to single locations‚ and things like buildings. Often the phrase ‘the environment’ is used to denote the global environment‚ or a larger regional
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June 18‚ 1812. One overlooked and critical detail when analyzing the events through a political lens is illuminated by the depositions of Mayor Edward Johnson and Major William B. Barney. Major Barney’s deposition discusses‚ in detail‚ General Stricker’s actions on July 27 and 28‚ 1812. Since General Stricker was one of the individuals targeted by the investigation‚ his deposition was not taken. Both Mayor Johnson and General Stricker were Democratic-Republicans‚ but each approached and responded to
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Canada. This report contains a very helpful basic background on acid rain as well as a questionnaire. It involves an annual report on the Federal-Provincial Agreements‚ sulphur dioxide emissions in the seven most eastern provinces‚ trends in acid deposition in the Atlantic provinces from 1980-1994‚ as well as acid precipitation in Kejimkujik‚ Nova Scotia. It also includes data tables‚ graphs and interesting facts concerning acid rain. INTRODUCTION This report is on acid rain and identifies the
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atoms. HIPIMS is a physical vapour vapor deposition technique . The power is applied to the target in pulses of low duty cycle (below 10%) and frequency (below 10 kHz) ‚which leads to pulse target power densities of several kW cm-2. Ultra-dense plasmas are obtained‚ which has unique properties ‚such as a high degree of ionization of the sputtered atoms and an off-normal transport of ionized species‚ with respect to the target. These features lead to the deposition of dense and smooth coatings on complex-shaped
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for deposition. Monaghan sought summary judgment in lieu of his deposition. Judge Miller of the US District Court in Indiana issued the decision. The decision basically states that Monaghan ’s claim of noninvolvement in the resulting accident is not valid and summary judgment will not be allowed. As the president of the parent company and a party to the company policy that is at issue in this case‚ his deposition would violate the plaintiff ’s right to pretrial discovery. Depositions can be
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Knowing Exposure Risks Important to Saving Structures from Wildfires Sep. 4‚ 2013 — A recent study of one of California’s most devastating wildland fires by the National Institute of Standards and Technology (NIST) and the U.S. Forest Service (USFS) strongly suggests that measures for reducing structural damage and property loss from wildland urban interface (WUI) fires are most effective when they are based on accurate assessments of exposure risks both for individual structures and the community
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causing gases. Lakes Aquatic settings are the most clearly impacted by acid deposition though because acidic precipitation falls directly into them. Both dry and wet deposition also runs off of forests‚ fields‚ and roads and flows into lakes‚ rivers‚ and streams. As this acidic liquid flows into larger bodies of water‚ it is diluted but over time‚ acids can accrue and lower the overall pH of the body. Acid deposition also causes clay soils to release aluminum and magnesium further lowering the
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