Compression-induced by the collision of the Iapetus rocks with North America caused a downwarp in the crust of the west Taconic mountains. Sagging crust from the downwarp was flooded by a broad shallow inland ocean and filled with sediments. This is evidenced because the Appalachian basin was formed by the downwarp in the crust of the west Taconic mountain. Sediments deposited in delta from the western side of the mountain, the Iapetus ocean, North America, Baltica, and the Gondwana plates converged. After a period of erosion, land began to subside and the water began to occupy the land.
About 400 million years ago, during the Devonian Period, plate tectonics also caused a mountain-building event known as the Acadian Orogeny. In the Acadian
The three faults being considered are thought to have influenced the character of some 120,000 square miles. The Big Pine, Garlock, and San Andreas faults are all mutually active, deep, long, and steep and noted as being conjugate shears. In concert, the faults have defined a primary strain pattern of relative east-west extension and north-south shortening of the area of 120,000 square miles. The large region is noted for its deformity, with the source of this being a northeast-southwest counterclockwise compressive couple. The compressive couple was potentially supported through drag as a result of the deep-seated movement of rock material from the Pacific region (Hill & Dibblee, 1953). The interaction of the faults in the San Andreas region since the Jurassic period have served to shape and contour the present geology of the land, while a study of the paleontology of the region likewise requires such knowledge to effectively determine conditions at any given point in time.
Tectonic plates are the reason why earth's surface area isn’t flat. Tectonic plate formed the Appalachian mountains and Mount Frisell. This happened millions of years ago, and the cause of the formation is that the tectonic plates collide into each other start to rise upwards. This brings up big pieces of rock from the crust to form mountains. Tectonic plate didn’t just form mountains is Connecticut they also form valleys. Valleys are formed by the tectonic plates repelling off each other and creating a big, long valley that could hold water in them. This is one of the steps how the famous Connecticut river was formed.
For example, The appalachian Mountains were formed by a massive continental collision over 300 million years ago. According to page 88 in my science notebook, the rocks in the Chattooga River is evidence of the continental collision. Mountains are formed when two continental plates collide, and form the mountains. The Appalachian mountains, were formed during Pangea. The North American Plate and the African Plate collided. When this happened the Appalachian Mountains were formed. These mountains then grew bigger, but as soon as it started growing, it also eroded. Erosion and
Cenozoic sedimentary rocks predominated to the west and east of the central mountain while plutonic rocks predominated in the peninsular ranges. The irregular contact between these geologic regions reflects the ancient topography of the area. The ancient oceanic crustal plate created an archipelago of a volcanic island. The former's subduction created immense volumes of magma. This resulted to the congealation of plutonic rock in the crust. The local rocks that existed before the tectonic forces uplifted, and erosion capped the deeply buried plutonic rocks that formed a steep and rugged mountains coastline, similar to that present one, which in the west coast of south America.
Rodinia started to rift around 750 to 600 million years ago and the Iapetus Ocean opening up as seen in Figure 1, the Swift Run Formation with Grenville, volcanic debris and ash material produced the Catoctin Formation that contains flood basalts supporting Shenandoah. With modern day East Africa rift and Red Sea curst stretched, this allowed flood basalts and rhyolite seep through the ocean floor and eventually made its way to the surface.
Past 360 million years ago, Kentucky was approximately 10 degree to the south of the equator when caves started to form. Kentucky was also occupied with water containing tiny organism having shells of calcium carbonate. When these tiny organisms died, shells accumulation of these creatures together with calcium carbonate emanating from water, built up more than millions of years such that it was hundreds of feet thick. On top of these formations, fifty feet of sandstone were deposited by another river system. Sandstone and limestone were exposed when the sea level started to fall approximately 280 million ago (Thompson & Thompson, 2003). When rivers that we have today started to form, sandstone topped plateau covered the Green River whereas a low limestone plain extended towards southeast direction (Call,
It consists of the state’s most unique landscapes – strangely long, tapered and almost parallel ridges and valleys, all mingling over water gap formations. The province extends from the center towards New Jersey (north-eastward) and into Maryland (south-westward). The province’s ridges and valleys are made up of Sedimentary rocks from the Paleozoic Era. Metamorphosed Proterozoic volcanic rock (~575 million years old) is also found in some ridges of the South Mountain sector of the province. The sediments were originally deposited in a horizontal manner, but then these rocks were subjected to a high amount of heat and pressure during the Alleghanian orogeny, which resulted in them being folded and angular. The erosion of sediments over the years have formed a very distinct landform – valleys have been formed over areas of shale and limestone (softer rocks) and ridges have been formed in the areas of sandstone (harder rock). This Province is divided into 7 sectors: South Mountain, Great Valley, Blue Mountain, Anthracite Upland, Anthracite Valley, Susquehanna Lowland and Appalachian
Found in the Appalachian Region, the Juniata Formation extends from central-southern Pennsylvania to Tennessee (Davies 2010). Though the thickness of the Juniata Formation is far from constant across its lateral extent, it is approximately 2000 feet thick in northern Pennsylvannia and thins towards the southwest (Crowder 1980). Named for the Juniata River running through southern Pennsylvania, this formation consists of sediments from the Taconic Orogeny in the late Ordovician period (Crowder 1980). Figure one displays the characteristic layers of alternating red sandstones and shales, which are divided into three distinct units (Darton
The impact of the bolide created what geologists call the “Exmore Crater,” which is thought to have been as large as the state of Rhode Island and as deep as the Grand Canyon (“Chesapeake Bay Geology”). The area was covered in Ice Age glacial sheets up until 18,000 years ago when climatic warming forced the sheets to melt and retreat, allowing new wildlife and plant species to appear. The melting water of the glacial sheets flooded into the Susquehanna, Potomac, James, and York rivers and eventually poured into the Atlantic Ocean, causing sea levels to rise. This rise in sea level, in turn, submerged the Susquehanna River Valley, and formed the rough outline of the present day Chesapeake Bay (”Bay
The Ozark Mountains are characterized by eroded plateaus caused by the collision of the super continent of Gondwana, which compressed the present continents of South America, Africa, Antarctica and other land masses. These forces uplifted Arkansas with limestone and calcareous rocks such as sandstone and chert. Erosion lowered the surface creating a level plateaus which included: The Boston Plateau, the Springfield Plateau, and the Salem Plateaus. Rivers, over time, cut valleys into the plateaus. Present day Fayetteville-Springdale-Rodgers, Harrison, Mountain Home, Batesville, and Clinton are all cities which are within the Ozark Mountains boundaries.
- In the geological aspect, the Native Americans that tended to the land did not aggressively control the land leaving rich soil for the incoming Europeans to later on control. But they also burnt down many trees to create living spaces for the tribes. Geographically it was good for the Europeans because it was by the water and all the rocks underneath the top layer of soil were rich for farming.
To support the theory of continental drift is through topography, surveying the floors of oceans, charts of rock magnetism, and statistics on rock ages (Trefil & Hazen, 2010). At one time scientist believed that the deep ocean floors were flat; accumulating the sediment that progressively wore away from the prehistoric landmasses (Trefil & Hazen, 2010). However, they discovered steep-walled valleys and elevated highlands. This was evidences that just as the continents are transformed and are active, so to is the seafloor (Trefil & Hazen, 2010). The Mid- Atlantic Ridge, positioned in the central part of the Atlantic Ocean, is recorded to be the longest mountain range on this planet. Volcanoes, lava flow, and earthquakes are a source of
In the early 1700s, settlers from France came to the Atchafalaya River Basin to trade furs with the Native Americans and perform raids into tribal areas to gather slaves. Peace was eventually reached in 1718, but the Native American population had decreased tremendously as a result of warfare and new diseases. Once the British won the French and Indian War in 1763, Acadians from Nova Scotia began seeking a new Acadia, or nouvelle Acadie, in America. It wasn’t until 1765 that they reached Louisiana and settled in New Orleans along the Teche Ridge. The Acadians developed a variety of new skills such as: rudimentary farming, logging, and ranching.
In the short story “The Short Life of Francis Macomber," Hemingway portrays many emotions and motivating forces behind his characters’ intentions. Ernest Hemingway experienced many historical events in his lifetime, in which, he endured humiliation and disappointment such as wanting to join the military, but being unable to due to a health condition (Young). Hemingway also underwent a divorce four times (Young). These experiences help influence Hemingway’s writing style, especially in “The Short Life of Francis Macomber,” when he demonstrates the challenges the characters undergo throughout the short story. The plot of the story is about the experience of an American married couple who go
Public-private divide structure the priorities of human rights issues in Afghanistan. The private sphere is traditional and immune to outside interferences. The public sphere is subject to interference from the outsiders. The United States government, like many other governments, most always has a hidden agenda when they choose what issues to privatize and what issues to publicize. American troops tend to ignore private issues such as domestic abuse and women’s education in Afghanistan because these issues are seen as private issues; however, when there is something to gain from interfering it becomes a public issue. Sharbat Gula is a young Afghan girl who for seventeen years was only a picture, lacking a name and a story in the American media. Seventeen years later the photographer, Steve McCurry, returned searching for this young girl to publicize her previous unimportant story. He returned to publicize the violation to women’s right to education in Afghanistan. The hidden agenda was to show the American people that Afghan women needed saving from their culture and society. Yet, there was no mention that the war that the United States is a part of is what ruined these women’s futures. The United States troops in Afghanistan rescued a brutally tortured and abused Afghan woman named Aisha Bibi after she was left to die in the mountains by the Taliban. At first glance the American audience see the American troops as heroes, however, when closely analyzed a hidden agenda