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
The Grand Canyon is carved by the Colorado River in the state of Arizona. The Grand Canyon is 277 miles long, about 18 miles wide and a depth of more than a mile. Any clues that scientis usually rely on have been sweap away by the rivers water or barried by landslides or destroyed by volcanos. Rocks give geologiest complete geological rocords of earth; as if each rocks told a story that was billions of years old. One clue is the "Black rocks" located at the end of this river.
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.
All three sections of Canyonlands has its own distinct features that attract so much attention every year but what many would love to know is how has this immense landscape come to be?
Little Cottonwood Canyon is a site bursting with geological history, rock formations earthquake potential on the fault, prehistoric glacial formations, landslides, and many hazards associated with it. The Wasatch fault is bound to have a enormous earthquake in the future and has left behind numerous scars. The mountains have been engraved by glacial formations dated back to the Ice Age (~14,000 years ago). Rock falls and landslides have left hefty boulders as indication of erosion and moisture in the rocks. The hazards on this mountain range are mass wasting, radon, earthquakes, and flooding of Little Cottonwood Creek.
A description of the grand canyon rock layers would include the Colorado River running at the bottom of the inner gorge with flats on both sides which consist of tapeat sandstone layers. There is also the Vishnu Complex, consisting of rocks that have been changed by heat and are buried at the lowest layers. These are tilted and are called the “Grand Canyon Supergroup” the Grand Canyon supergroups are at least 12,000 ft in thickness. These rocks or (the “Inner Gorge”) are usally steep and narrow with hard deep cuts in the lower tilted layers which raise above sea level.
The latest rocks in this region were formed in Pleistocene time as imperfectly consolidated gravel of river terraces and alluvial deposits of the
Broken pieces of rock would have drifted down a river, eventually the broken pieces of rock would have settled at the bottom of the water and become deposited, the deposited rocks form layers, the weight from the pieces of rock squashes the bottom layers of sediments and the water between the rocks are squeezed out, Crystals and different salts start to form which causes a type of glue- this is called cementation, eventually a sedimentary rock is formed, however this may take Millions of years.
The forming of the geologic features go way back to starting with the beginning of North America millions of years ago. The land that is now known as Eastern California, was covered by a shallow sea. North America was slowly being pushed westward and oceanic crust was being pushed onto the side and being pulled underneath the continent. After continuous repetition, this accretionary wedge formed. This is when some of the crust pushes up onto the edge of the
Another main example of Abbey’s ability of using writing elements is how he writes setting. In each chapter he picks different places- some similar to each other, some completely different. Regardless, they are all significant to his life. One place that he writes about is the desert. In Chapter 2, he advises the reader to stay out of any desert, and lists the various hazards that come with going to such a place. What makes this significant is how critical Abbey gets of the desert. In other chapters, he seems to have a positive voice and praising areas for their beauty, yet Chapter 2 is one of the only chapters to feature large amounts of blatant criticism. He makes it clear that “everything in the desert either stings, stabs, stinks, or sticks.”
The Grand Canyon has plenty of volcanic rocks near the bottom and the top. ICR, Institute for Creative Research, has been involved in a project for years to date these volcanic rocks. this study has come a long way to show that many of the Grand Canyon strata could have formed rapidly, and that the erosion of the Canyon by the Colorado River has not been going on for millions of years.
The park’s granite is made up of smaller bodies of granite. This is one reason why there are many varieties of granite. Weathering of exposed granite is slow because weathering depends on whether there is moisture or not. Edges and corners of joint granite blocks are more affected when weathering occurs. Unweathered remains of granite turns into rounded boulders. Small natural depressions turn into weather pit when water collects in a depression on granitic surfaces. A possible explanation for weathering is that alternate wetting and drying along the pools that collect in the pans. Darker granitic rocks are high in biotite and weather quicker than the lighter rocks. The foothills are located at the west edge of the park and eastern summit area. They are remains of ancient rocks and sediments. Evolution of the landscape is a big part of the geology just like the rocks themself. As the earth became cooler, the sierra nevada mountains rose high enough for creating glaciers and mountain icefields. The majority of Yosemite is made of plutonic, igneous rock. The plutonic rocks were formed by intrusions of magma into older rocks. These are as old as 130 million years. Forms of plutonic rocks in Yosemite are granite, granodiorite, tonalite, quartz monorite, and quartz monzodiorite. Metamorphic rocks have been changed by pressure that can result in being buried in earth. There are 2 belts of metamorphic rocks, one on each side of the batholith of plutonic
Have you ever thought Manhattan, New York could be compared to the PA Grand Canyon with common points? People wouldn’t think so because one is a busy city and the other is a rural town. Although they bear some superficial similarities, such as tourist, family, attractions, and size the differences between Manhattan and the PA Grand Canyon are clear.
I was surprised when I found out that people live along side of such a beautiful canyon like this. It is said that still to this day you can see signatures of past residence that lived here on rocks and cabins. Although many don’t remain settled there today, they still make routine deliveries to forest service locations. It is amazing that a mail delivery system dating back to the 1920’s still continues today. The most amazing part of this film is seeing how settlers lived in such a remote place on earth. No electricity, no running water etc. Many citizens came to the United States because of the industrial revolution. This reminds me of when we talked about the citizens came over seas in hopes of a better life and getting a job. These citizens all lived in Miami and created their own community much like Hells Canyon. While I was watching this film I just could not understand on why many settlers chose to live here. Setting in the Hells Canyon is the complete opposite of the industrial revolution. We talked about in class, people often are not choosing where to live but actually forced to live where they do. I think the example of the Hells Canyon is the opposite. Many settlers have actually moved and choose to live in this wild
The process of the formation of igneous rocks begin all the way down in the Earth's mantle. The mantle consisted of hot magma that is constantly moving due to the convection currents. Convection is the heat transfer of liquid and gases .As the bottom of the mantle begin to heat up, the magma rises to the top because it becomes less dense. Once it reaches the top it cools off and becomes more dense and fall back to the bottom and the cycle of convection begin again.