Pangaea‚ Pangæa‚ or Pangea (pron.: /pænˈdʒiːə/ pan-JEE-ə;[1]) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras‚ forming about 300 million years ago.[2] It began to break apart around 200 million years ago.[3] The single global ocean which surrounded Pangaea is accordingly named Panthalassa. The name Pangaea is derived from Ancient Greek pan (πᾶν) meaning "entire"‚ and Gaia (Γαῖα) meaning "Earth". The name was coined during a 1927 symposium discussing Alfred Wegener’s
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PHILIPPINE MINING LAW What is mining? Mining is the extraction (removal) of minerals and metals from earth. Manganese‚ tantalum‚ cassiterite‚ copper‚ tin‚ nickel‚ bauxite (aluminum ore)‚ iron ore‚ gold‚ silver‚ and diamonds are just some examples of what is mined. Why mine? Mining is a money making business. Not only do mining companies prosper‚ but governments also make money from revenues. Workers also receive income and benefits. History of Mining in the Philippines First Mining Law:
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1. Explain the difference between a “reserve” and a “resource”. What factors influence estimates of reserves and resources for commodities such as minerals or fossil fuels? Resources and reserves are similar in that the both benefit humanity. Resources are materials that can be used to satisfy human needs‚ or used as support. Reserves on the other hand are known deposits with the ability to extract the available material economically; the size of these reserves is not always known or defined
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pictured)‚ and Nankai Trough. Here‚ we can observe that the trenches (yellow line) are parallel to the volcanoes (red dots). You can almost draw a straight line to connect all the volcanoes. Moreover‚ the data above is evidence of the presence of subduction zones wherein the collision of two plate boundaries causes the denser plate to sink below the less dense plate into the asthenosphere. This type of tectonic activity promotes the formation of volcanic island arc-trench systems. The arc-trench systems
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itself is known by the scientific community as the Sumatra-Andaman earthquake.[3][4] The resulting tsunami is given various names‚ including the 2004 Indian Ocean tsunami‚ Asian Tsunami‚ Indonesian Tsunami. CAUSES The earthquake was caused by subduction and triggered a series of devastating tsunamis along the coasts of most landmasses bordering the Indian Ocean‚ killing over 230‚000 people in fourteen countries‚ and inundating coastal communities with waves up to 30 meters (100 feet) high.[5] It
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Reading Kate Chopin’s ’Story of an Hour’ leaves on reader’s mind a strong theme of the gender disparity present in the institution of marriage. The narrative about a woman’s sorrowful state and life under her authoritarian husband introduces Mrs. Mallard first in the exposition paragraph as having a ’heart trouble’ which requires ’great care’(pg. 15). It is quite ambiguous as to whether the trouble is physical or emotional. Even so‚ Chopin uses this trouble as a way of symbolizing the suffering
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Geo. 101 Ch1. Homogeneous Accretion Theory for the formation of the differentiated earth 1.Early Earth- uniform composition&density(mostly silicates) 2. Earth heated up to melt Iron&Nickel to create a core. Heated by meteorite impact‚ gravitational compression‚ &radioactive decay the iron/nickel weigh more than silicates so settled to earth’s center. 3. Earth was formed consisting of a dense iron-nickel core; an iron-rich silicate mantle and a silicate crust with continents emission of gases
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Metamorphic and Igneous Rocks of the Hudson Highlands 3rd Field Report Abstract The entire region of the Hudson Highlands underwent high-grade metamorphism‚ and at a series of locations different intrusions occurred during the Grenville Orogeny. Certain evidences to help back up this claim are the presence of gneissic rock and index minerals such as Siliminite and Garnet. Since the mineral composition indicates granulite facies‚ then its protolithic content is pelitic‚ meaning shale/mudrock. Also
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EOSC 112 Learning Goals for Final Exam‚ Fall 2012 Course Learning Goals: By the end of this course‚ students will be able to… 1. DESCRIBE how Earth’s geosphere‚ atmosphere‚ hydrosphere‚ and biosphere comprise an integrated system driven by a continuous supply of energy 2. EXPLAIN the primary factors determining Earth’s climate 3. EVALUATE evidence
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Currently‚ there are fifteen subduction-related volcanoes active along the Cascade chain. Before 1980‚ the last one to erupt was Mt. Lassen in California‚ in 1914. In the mid-1970’s scientists were concerned that Mt. Baker‚ in northern Washington‚ might be the site of the next volcanic eruption‚ based on increased activity on the volcano. However‚ in 1978‚ Dwight Crandell and Don Millineaux of the USGS suggested that Mt. St. Helens was potentially the most likely volcano to erupt in the twentieth
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