Geology of the Appalachian Mountains

The Appalachian Mountain range is one of the oldest continental mountain systems in the world. The tallest mountain in the range is the 6,684-foot Mount Mitchell, located in North Carolina. Compared with the Rocky Mountains of western North America, which have 50 plus peaks over 14,000 feet in elevation, the Appalachians are rather modest in height. At their tallest, however, they rose to Himalayan-scale heights before being weathered and eroded down over the past ~200 million years. A Physiographic Overview The Appalachian Mountains trend southwest to northeast from central Alabama all the way to Newfoundland and Labrador, Canada. Along this 1,500-mile path, the system is split up into 7 different physiographic provinces  that  contain distinct geologic backgrounds. In the southern section, the Appalachian Plateau and Valley and Ridge provinces make up the western border of the system and are composed of sedimentary rocks like sandstone, limestone, and shale. To the east lie the Blue Ridge Mountains and Piedmont, composed primarily of metamorphic and igneous rocks.  In some areas, like Red Top Mountain in northern Georgia or Blowing Rock in northern North Carolina, the rock has eroded down to where one can see basement rocks that formed over a billion years ago during the Grenville Orogeny.   The northern Appalachians are made up of two parts: the St. Lawrence Valley, a small region defined by the St. Lawrence River and St. Lawrence rift system, and the New England province, which formed hundreds of millions of years ago and owes much of its present topography to recent glacial episodes. Geologically speaking, the Adirondack Mountains are quite different than the Appalachian Mountains; however, they are included by the USGS in the Appalachian Highland region.   Geologic History To a geologist, the rocks of the Appalachian Mountains reveal a billion-year story of violent continental collisions and the subsequent mountain building, erosion, deposition and/or volcanism that came with. The geologic history of the area is complex but can be broken down into four major orogenies, or mountain building events. It is important to remember that between each of these orogenies, millions of years of weathering and erosion wore the mountains down and deposited sediment in the surrounding areas. This sediment was often subjected to intense heat and pressure as the mountains were uplifted again during the next orogeny.   Grenville Orogeny: This mountain-building event occurred around 1 billion years ago, creating the supercontinent Rodinia. The collision formed tall mountains along with the igneous and metamorphic rocks that make up the very core of the Appalachians. The supercontinent began to break apart around 750 million years ago and by 540 million years ago, an ocean (the Iapetus Ocean) existed between the paleocontinents.  Taconic Orogeny: Approximately 460 million years ago, as the Iapetus Ocean was closing, a volcanic island arc chain collided with the North American Craton.  The remnants of these mountains can still be seen in the Taconic Range of New York.Acadian Orogeny: Starting 375 million years ago, this mountain-building episode occurred as the Avalonian terrane collided with the North American Craton. The collision did not happen head on, as it struck the northern section of the protocontinent and then slowly moved southward. Index minerals show us that the Avalonian terrane stru ck the North American craton at different times and with different collisional forces.Alleghanian Orogeny: This event (sometimes referred to as the Appalachian orogeny) formed the supercontinent Pangea ~325 million years ago. The ancestral North American and African continents collided, forming Himalayan-scaled mountain chains known as the Central Pangean Mountains. The modern-day Anti-Atlas Mountains of northwestern Africa were part of this chain. The mountain building ended some 265 million years ago, and the ancestral North American and African continents began drifting apart ~200 million years ago (and continue to do so to this day). The Appalachians have weathered and eroded away over the past hundreds of millions of years, leaving only remnants of the mountain system that once reached record heights. The strata of the Atlantic Coastal Plain are made up of sediment from their weathering, transportation, and deposition.

Dark Side of Science - Free Essay Example

Sample details Pages: 3 Words: 1014 Downloads: 6 Date added: 2017/09/18 Category Science Essay Type Argumentative essay Did you like this example? â€Å"Only guard yourself and guard your soul carefully, lest you forget the things your eyes saw, and lest these things depart your heart all the days of your life. And you shall make them known to your children, and to your children’s children. † Deuteronomy 4:9. (USHMM) Were the experiments that the Nazi’s conducted on the Jew’s beneficial or detrimental to the advancement of science? I think to understand the question we must understand the why, of the situation. For example Dr. Fritz Klein’s response to Dr. Ella Lingens-Reiner when she asked, â€Å"How can you reconcile that (the ash coming from the chimneys) with your oath as a doctor? His answer was, â€Å"Of course I am a doctor and I want to preserve life. And out of respect for human life, I would remove a gangrenous appendix from a diseased body. The Jew is the gangrenous appendix in the body of mankind. †(Lifton 12) Reichsfuhre Josef Mengle was known as the â€Å"Angel o f Death†. Mengle’s area of expertise was genetics and twins. He wrote his medical dissertation on how the structure of the lower jaw differed between the races. The twins he kept as pets, isolating them from the rest of the camp, giving them treats of candy and clothes, bribing them for before he would perform horrific experiments on them. The twins would endure daily blood draws and injections in the eye in hopes that he (Mengle) would be able to change their eye color. He even went so far as to sew a set of twins together to see if he could create â€Å"Siamese twins†. On Mengle’s orders, children suffering from noma were put to death in order for pathology investigations to be carried out. Organs and even complete heads of children were preserved and sent in jars to institutions including the Medical Academy in Graz, Austria. (Bard 1) More often than not, there was no real medical knowledge gained from any of his experiments. Sigmund Rascher howev er focused his experiments on high altitude sickness and hypothermia on Dachau camp prisoners. (Harvard) The experiments of high altitude were meant to push the limits of human endurance and existence. Prisoners were often placed in a low pressure chamber and the pressure was raised within. Most died, some did not. The hypothermia experiments were also meant to test the strength of the human body. The purpose behind these experiments, were to find the most effective way to re-warm a person who had been exposed to freezing temperatures. Bard 1) Carl Clauberg also had Auschwitz prisoners at his disposal; he injected chemical substances into women’s uterus’ and ovaries to find a â€Å"cheap and effective method of sterilization†. Herta Oberheuser, killed children with oil and evipan injections. Her â€Å"research† (and I use that term loosely) focused on deliberately inflicting wounds on prisoners, to simulate the combat wounds of German soldiers. Oberheuser would rub wood, rusty nails, slivers of glass, dirt and sawdust into the wounds of prisoners. (Bard 1) Karl Brandt preformed Sulfanilamide experiments at Ravensbrueck between July 1942 September 1943. These experiments were conducted for the benefit of the German soldiers. These experiments were to test the effectiveness of sulfanilamide and other drugs as treatments for infected wounds. (Sulfa drug testing was also going on in other parts of the world). Brant was also instrument in the study on bone, muscle, nerve regeneration, and bone transplant experiments. These also were preformed on inmates at the Ravensbrueck camp. (Harvard) The pro and cons of Germany’s bio-medical vision. The experiments that the Nazi’s preformed on the Jew’s were varied. But how has these crimes committed against man benefited or hurt the advancement of medicine. But what we have to understand is that science is amoral. (Orac 1) It is the people who use science, use it as a me thod, a tool for measuring things, it is these people whose morals the experiments reflect. For example a chainsaw is just that; a chainsaw, it has no notion of right or wrong, as a tool it can be used for evil or good. It is the person wielding the chainsaw one must worry about. The same can be said about the Nazi doctors, they were so focused on their Aryan bio-medical vision, they didn’t see the forest for the trees. However, they did produce some rather life altering inventions, such as: the electron microscope and they established the link between asbestos and lung cancer. â€Å"In addition Nazi Germany also forbid the use of the pesticide DDT on the grounds that it was a health hazard and instead used a german produced version known as cyclone-b. † (Kemp 1) â€Å"Also Nazi scientist were among the first in the world to warn of the dangers of radiation; asbestos, lead, cadmium, and mercury. † (Kemp 1) â€Å"Indeed German physicist and engineers develope d what was in essence the first cruise missile (V-1)† (Orac 1) In conclusion I believe that the Third Reich Regime did stumble upon some very amazing medical findings. However the results of the experiments are unreliable do to the poor health of the patients, in combination with their unhealthy living conditions. The information the scientific community has learned is invaluable. And while the experiments themselves remain un-reproducible, and the lives are un-replaceable, we as a society are armed with a knowledge that no one can take away. â€Å"Never shall I forget that night, the first night in camp, which has turned my life into one long night, seven times cursed and seven times sealed. Never shall I forget that smoke. Never shall I forget the little faces of the children, whose bodies I saw turned into wreaths of smoke beneath a silent blue sky. Never shall I forget those flames which consumed my faith forever. Never shall I forget that nocturnal silence which de prived me, for all eternity, of the desire to live. Never shall I forget those moments which murdered my God and my soul and turned my dreams to dust. Never shall I forget these things, even if I am condemned to live as long as God Himself. Never. † (Wiesel 32) Don’t waste time! Our writers will create an original "Dark Side of Science" essay for you Create order

What Everybody Dislikes About Best Friend Essay Samples and Why

What Everybody Dislikes About Best Friend Essay Samples and Why What Best Friend Essay Samples Is - and What it Is Not There are an infinite number of quantities of tattoos that will get the job done for best friends. There are a number of places to have ideas for the best friend tattoos. In addition, a tattoo of the greatest friends face, birthday, name or initials might not be the ideal idea. As it is going to be in May, we would like to plant beautiful flowers in her garden. What Everybody Dislikes About Best Friend Essay Samples and Why Bridget's essay is extremely strong, but there continue to be a couple little things that could be made better. The fight becomes quite serious and we met the principal to address the matter. You ought to be proficient in the topic, have an overall idea about the chosen issue and figure out how to get the best arguments to show your thesis. In the principal body of the friendship essay it is possible to elaborate on the aforementioned su bjects, using them as cornerstones. Free Best Friend essay samples can be found FreeEssayHelp with no payment or registration. Inside this Book is my very best friend' essay, I'll demonstrate that books still remain our finest friends for the reason that they might be outdated as physical objects, but much less an idea. Therefore, before you pay to write essay for you, make certain that you have taken necessary measures to make sure that you my very best friend essays are choosing the appropriate professionals and service who can write quality my very best friend essays papers for you. Browsing our essay my very best friend essays writing samples can provide you an idea whether the standard of our essays is the quality you are searching for. New Questions About Best Friend Essay Samples Occasionally it's helpful to observe how others were able to get over the difficult first-line hump. It's a person who is always prepared to come to assist you, somebody who understands you and doesn't ask questions if you don't wi sh to. A friend will permit you to win sometimes especially if he's too fantastic that you beat in a for instance a game like chess. Someone is never likely to feel alone in the existence of books. The True Meaning of Best Friend Essay Samples Bear in mind however, that the choice to have a dog is a significant one that shouldn't be dismissed. The time and effort spent taking care of your dog is going to be returned to you in the shape of the lifelong loyalty and friendship that you are going to receive from your dog. You have to attempt to trace your friends' behavior to a particular event once you're confident that they're ignoring you. A friend also attempts to make you truly feel good about yourself especially whenever you have confidence problems and your ego is shattered. Let's take a better look at a number of the things that could demonstrate the real value of friendship. You have to be sure your friends are deliberately ignoring you before you jump to conclusions that may bring a stop to your friendship. A friend is a person who's with you in positive and negative times, somebody who shares your joys and sorrows. Carefully observe your friendship and watch out for a few of these obvious indications your friend could be ignoring you. A friend corrects you once you are in the incorrect. It's normal and at times inevitable to be attracted to your very best friend. Thus, what really makes a friend your very best friend. If your friend loves nature, you can present your friend a gift that is constructed of recycled materials of all sort. Make sure you're likely to watch your friend's beloved team. Generally, it's difficult to get a single and direct definition of the very best friend. You don't need to bow to fashion and purchase the most stylish and pricey clothes, but maybe a very simple move away from the too-short-pants and bright over-sized sweatshirt will aid your child be among the gang. In the realm of animals man's best friend is referred to as a dog. Friendship is having the capability to cry together. It is the relationship between two or many friends. They are not born overnight, but they can be lost almost as quickly. They are very important in life.

The Secret History free essay sample

The prologue, as in many works of literature, is used as a way of gripping the reader – making one enthralled in the text, introducing themes that reoccur throughout the text (for example the narrator’s journey in this particular novel), along with characters, and the style of writing used. Within the first few lines of the prologue, we learn that ‘Bunny’ is dead, yet we are not told exactly who he is or why he was killed, which adds to the tension that builds up until the inevitable death of the character. Because the death is mentioned in the prologue, the reader progresses through the text bearing the chilling knowledge that this character that we as a reader become accustomed to is bound to die. This does in fact add to the overwhelming sense of fate that is forever present during the novel. We are told of â€Å"Henry’s modest plan†[1], which introduces the character of Henry as being probably a character that the others look up to and acknowledge as being their leader. To say that the plan was ‘modest’ comments on the narrator’s morality, giving one the impression that they didn’t think highly of Bunny enough to make a more reasonable alternative to his murder. The narrator himself does not seem so much resentful of the incident, as tormented by it. His mind is occupied by the events, yet he does not feel emotion for the death of Bunny – only sympathy for his own involvement. From this we can sense that the writing will be seen through a troubled perspective that will be biased and unjust at times. The writing style uses a lot of pathetic fallacy which is common in gothic thriller novels, for example, R.L. Stevenson’s Jekyll and Hyde, which uses the weather at numerous places throughout to set the mood and atmosphere that will represent the action in the coming chapter. The setting of the prologue is described in a vivid way giving the narrator’s memories a sort of ethereal delicacy to the scenery, and many of the aspects of the language present an oxymoronic metaphor, for example, the description of what would be a peaceful setting: â€Å"shivering apple blossoms†[1] is presented in a chilled and harrowing way, not unlike the obscure descriptions of setting in Anthony Burgess’ Clockwork Orange in which the narrator described often brutal and violent scenes as beautiful. This link is more obvious in Julian’s description of the â€Å"horror of love†[1] later in the novel. The prologue is written in a linear thought trail and sounds as if the narrator is musing over the events that have happened. Throughout the book, the narrator often branches off into tangents thought chains. He presents the story as if he was a stranger who happened to be overlooking the events – in the sense that he speaks with a large level of emotional distance. The scene that Richard paints is one of prolonged fear. As the prologue unfolds, his narrative becomes more cluttered, like the thought train of a troubled mind. He starts off by introducing the scene rather delicately and plain, but by the end of the prologue he is using vivid and harsh detail. This is mirrored in the events in the book. In the beginning the action is slow, but throughout it increases until it progresses to a helpless state that Richard cannot help or stop. The prologue introduces the growing state of anxiety that Richard is seen to emit during the book itself. This can also be linked to the journey that Richard takes from being at peace to in distress, the amount of pressure builds up on him until he can do nothing else but succumb to it. In a way, the prologue can be somewhat linked to that in Shakespeare’s Romeo and Juliet, in the sense that the actual focal point of tension in the stories, the deaths of the characters, are revealed in the opening of the text itself. The two lovers in this story are represented by pairs of characters – Charles and Camilla, Henry and Francis, with Richard and Bunny pairing with all of these characters (Bunny in a more-negative way). Essentially the book presents circumstances in which these pairs are in a constant state of tension, for example in the first half everyone’s growing hatred of Bunny and in the last half the disintegration of the bond between most, if not all, of the characters – and Richard’s struggle to maintain his â€Å"perfect† lifestyle. The prologue is written in a well thought out way. It seems as if the narrator has relayed the events over and over in his mind until the events have ceased to be a story in his mind. For instance, we can see this in the way the speech in the prologue has no speech marks; â€Å"Why, looking for new ferns, said Henry†[1]. In the narrator’s mind this mere sentence has stopped being merely words and is now a matter of fact – he can’t change what has happened, not even in his imagination. This also relates to Richard’s feelings that his tragic tale is â€Å"the only story†[1] that he will ever be able to tell. In conclusion, the prologue does have an immediate effect on the reader’s prejudgement of the novel, which in itself prepares the reader for the coming events in the book. Without the feeling of retrospect that the prologue introduces, the tension and dramatically irony that runs deep within the book’s story would not gain momentum throughout the novel, and the intrigue that the reader feels about the provocation of the murder would have been less. The prologue, in a way, acts as a glorified synopsis for the novel. Without it, I doubt that the reader’s interest would have been held more than the 200 word mark. But this is only because the author has written the book in a way that makes one feel for the characters, an actual emotion can’t be brought upon instantaneously.