Viewing America with Geology Essay

The Yellowstone volcano is very active volcanic system which requires much observation. The geysers, mudd pots, hotsprings and steam vents are all examples of the heat from molten rock of a volcano. For many years the Yellowstone volcano could not be located. There is not obvious signs of a volcano, but scientists looked for other clues. Rhyolite is present in a location that has pinetress and many mosquitoes can be found due to the lakes that have formed. Rhyolite is a very violent eruption, due to the high silica content,  it flows slowly, like honey, and tends to pile up and form lava

The United States was changing in the 1800’s. Many settlers moved to the west, populating the plains. For many Americans, the movement westward brought new economic opportunities, but for others it meant conflict and a way of life.

Volcanos are deadly, can form on islands or mainland, and can destroy mountains and cities. Volcanos commonly form from holes in the earth containing magma. When pressure builds up in these magma chambers, they explode resulting in magma and rock catapulting out into the air. As these volcanoes repeatedly explode, they leak magma, which runs down the side of the volcano. Eventually, the lava cools and transforms into solid rock, building up the volcano to mountain size. An example of giant volcanic eruptions is the Pompeii disaster in 79AD, when Mount Vesuvius erupted and destroyed all of Pompeii. Another example includes, the 1980 eruption of Mount St. Helens in Washington state, which destroyed the whole mountain. Volcanos

Imagine being on an island when all of a sudden an ear-shattering boom reverberates around you. On August 27, 1883, 10:02 in the morning, Krakatoa erupted with immense force on a modern-day Indonesia island. Almost a century later, Mount Saint Helens, located in the state of Washington, erupted at 8:30 a.m., on May 18, 1980. Although Mount Saint Helens and Krakatoa had a lot of distance from each other, they were both composite volcanoes. Composite volcanoes produce a thick lava that causes a lot of damage.

American history is in a process of continuous change when it comes to ideas, infrastructure, and of course, land. While many argue against the idea of the detrimental effects environmental destruction, numerous events in history have known to show otherwise such as in the Columbian Exchange, the Industrial Revolution, and Westward migration.

The west coast of North America has been tectonically and volcanically active for billions of years. The Sierra Nevada Mountains in eastern California were born of volcanoes, and magma has been erupting in the Long Valley to the east of the mountains for over three million years (Bailey, et. al., 1989). However, the climactic eruption of the region occurred relatively recently in the region's geologic history. About 760,000 years ago, a huge explosion of magma warped the Eastern Sierra into the landscape that exists today. The eruption depleted a massive magma chamber below the earth's surface so that the ceiling of the chamber imploded, forming what is now known as

AAmerica began as a small struggling nation, with each citizen desiring an opportunistic way of life. To achieve this way of life, many changes needed to be made. Different people with distinctive ideas came together, and although there was conflict, they made great changes politically, socially, and economically. Each aspect changed America tremendously in a variety of ways. Analyzing each specific change can determine the extent in which America has changed for better or for worse.

The United States has had numerous changes from 1776 to 1870. Things have changed politically, economically, and socially. These three factors underwent important transformations during the time period of 1776 to 1870, especially in the South after the Civil War.

On May 18th, 1980 one of the worst volcanic eruptions occurred in the United States. Triggered by an earthquake, Mount St. Helens erupted in Washington State at 8:39am. According to the National Oceanic and Atmospheric Administration, it was "the deadliest and most economically destructive event in the history of the United States." There were many effects from this terrible, natural event. People, animals, and the environment were all effected.

From 1790 to 1812 in America were tough times; Indians were constantly attacking the colonists, the population was steadily growing, making government control more and more difficult, among many other problems. These problems, though, are what shaped America to what we know it as today, as every problem created a solution that would continue to help America, some even to this day.

In the mid to late 1800s the United States were beginning to develop towards the west on the Great Plains. A major contributing reason was the train. The rail road tracks connected and stretched all over the country connecting people like never before. This changed life for many people on the great plains, some of those people being ranchers, settlers, and Native Americans. These three groups of people were connected positively and negatively.

The third eruption happened about 640,000 years ago, and spewed 240 cubic miles of material. This third eruption created the third and largest of Yellowstone’s calderas, Yellowstone Caldera, which is 30 by 45 miles in size. The pyroclastic lava flows from this eruption formed the north wall of the caldera and are visible from the south-facing cliffs east of Madison. (Solcomhouse) This third eruption is said to have vaporized an entire mountain range. Smaller eruptions have also helped to shape Today’s Yellowstone, such as one that occurred 174,000 years ago and created what is now the “West Thumb” of Yellowstone Lake. (National Park Service) Many sources say that a catastrophic eruption, such as those that have formed the three calderas at Yellowstone, is unlikely during the next several hundred years, but if one such eruption did occur it would devastate much of the United States and would have the potential to alter the global climate.

American history is filled with ups and downs. Starting out with only 13 colonies, America forcibly removed themselves from the one of the strongest empires in the world. Battling against political reform, the subtraction of resources from the motherland, the debt accrued by colonists, and the bank wars, America struggles to create a self-sustaining country.

The eruption happened on May eighteenth, 1980 at eight thirty-two in the morning. It was recorded to be the largest volcanic eruption in North American history. Millions of tons of earth were shot 65,000 feet into the air and surrounding areas. A new vent had been opened in the side of the mountain, and steam and ash were all that had been released from the vent. Smaller earthquakes and eruptions had occurred moments before the massive eruption. The eruption sent ash far in every direction, covering streets, houses, businesses, schools, and much more.

Volcanic activities contribute to the formation of different features that shape the landscape of a place. Volcanic eruptions can lead to the formation of depressions that differ in size and depth depending on their magnitude. Research highlights that calderas are depressions formed by chambers of magma and volcano edifices. In most of the cases, caldera depressions assume the shape of a bowl and vary in sizes. Initially, caldera was a Spanish word-cauldron that was used to describe topographic depressions that had the shape of a bowl (Geology.sdsu).