Where Rock Layers Are Flat Essay

Where Rock Layers Are Flat Essay

Length: 857 words (2.4 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

Additionally, the principle of original horizontality establishes that when rock layers are flat, they have not been disturbed and therefore are in their original horizontal sequence. Using the Grand Canyon as an example, scientists recognize that layers still have their original horizontality because they have not been folded and thus they have not experienced significant crustal disturbances.
Furthermore, relative dating uses the principle of cross-cutting relationships which states that features which cut through rocks must have formed after the rocks they cut across. This principle is important in understanding geologic time because it demonstrates that the material being broken through must be older than the material breaking through it.
Rocks which have been deposited without interruption are called conformable rocks. Contrastingly, an unconformity represents a long period of time during which deposition occurred instead of erosion, which removed rocks that were previously formed. There are three types of unconformities: angular unconformity, disconformity, and nonconformity. An angular unconformity contains titled or folded sedimentary rocks which are later covered by fresher and flatter strata. The second type, a disconformity, is a gap in the rock record which represents a period of erosion rather than deposition. The final type is a nonconformity, in which younger strata lie atop older metamorphic or intrusive igneous rocks. A period of uplift and erosion must occur in order for a nonconformity to develop. Once again using the Grand Canyon as an example, the sediment contained in the Grand Canyon contains all three types of unconformities which represent a long period where geologic time was not recorded.
Geologists re...

... middle of paper ...

...Argon dating, the geologic clock starts “when potassium-bearing minerals crystallize from a magma or form within a metamorphic rock”, making it the best option for volcanic material. Scientists typically employ Rubidium-Strontium dating for igneous and metamorphic rocks. Finally, Uranium-Lead dating is used for granite and other very old rocks. In conducting radiometric dating, scientists usually apply a cross-check method, which makes use of two different absolute dating methods in order to ensure that there is not an error.
In conclusion, there is no specific method of geometric dating that is better than others. Various methods of absolute and relative dating are frequently used by geologists and help to provide insight into the age of strata. Geology, as most sciences are, is very integrative and must analyze the whole picture to develop a full understanding.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

The Rock Of Rock And Rock Essay

- I was giving the opportunity to write about any lecture that was taught in class. I wanted to pick something that was easy and I enjoying learning about it. It was the rock cycle that caught my eye and attention. Just to learn more about the rock and how the rock was made it interesting. Also in lab I was able to identify the rock itself, what type of rock it was and how was it formed. I am a hands on learner, so it was great for me to able to touch and feel what the rock was made out of. Some rocks were hard while others were soft....   [tags: Sedimentary rock, Igneous rock, Rock]

Better Essays
988 words (2.8 pages)

My Observations On The School Yard Essay

- On Sunday September 20th The class of Geog 2020 went on a field trip to observe bio-physical features of the Ottawa area. Our first stop was to Erskine Johnson Elementary School in Kanata where there is a large visible outcrop of precambrian rock in the school yard. Our next stop was to The March Highlands Conservation Forest, a forested area that features beaver ponds and sand stone beddings. Next we moved on to the Crozier pit, a mining sight near Renfrew that features a large precambrian marble outcrop and deep pit with visible sediment layers on a the outside ridge....   [tags: Sedimentary rock, Metamorphic rock, Limestone]

Better Essays
2008 words (5.7 pages)

Enchanted Rock Essay

- Enchanted Rock Enchanted Rock is located near Fredericksburg Texas. It is a granite rock that rises 130m (425 ft) to the top, 1825 feet above sea level, and covers 640 acres. At the base there is a dry creek bed of granite that has been cut by a series of fractures. Fine black rock along these fractures is called gouge. Fault gouge is comprised of little pieces of rock that was ground upward when the fault moved. Once you go up the trail and climb past the trees to the large space of bare rock, you are on the exfoliation dome....   [tags: Papers]

Free Essays
496 words (1.4 pages)

Essay on Thomas Friedman’s The World is Flat

- World History In Thomas Friedman’s The World Is Flat he presents his idea of the globalization of the world in all areas; from economic to communication with other countries. Friedman is a journalist from the New York Times and most of his work focuses on economic and technological innovations and advancements, and furthermore how they are associated to history. The ideas he presents in this book are both plausible and convincing. The main focus is whether the world is “flat“. The answer to this question depends on the readers’ political, economical, and technological opinions....   [tags: The World is Flat]

Better Essays
1047 words (3 pages)

The World Is Flat By Thomas Friedman Essay examples

- When thinking if the world is flat or if it is not flat, we know it is not flat, because of science. On a more metaphorical standpoint, we can think of flatness as "Does it contain depth?". In this time frame does our world still contain depth. We have the ability to travel both high and low in our world. We can travel across the earth unlimited times in one life. With globalization we have to face, does our planet have any depth in which an outsider can not reach. Thomas Friedman believe the world is 'flat '....   [tags: The World Is Flat, Globalization, Earth]

Better Essays
1024 words (2.9 pages)

The World Is Flat : A Brief History Of The Twenty First Century By Thomas L. Friedman

- Book Review I read the book, The World Is Flat: A Brief History of the Twenty-first Century by Thomas L. Friedman. Freidman makes a lot of interesting points throughout the book that describes the “flattening” of the world. He believes our advancements in technology have brought us to a point in history where individuals can collaborate and compete globally. In chapters 1-4, Friedman, while on a tour of Infosys Technologies Limited in India, is stunned the campus has constructed glass and steel buildings and is equipped with advanced technologies such as large flat-screen televisions....   [tags: The World Is Flat, Thomas Friedman, Computer]

Better Essays
930 words (2.7 pages)

Rock And Roll : Rock & Roll Essay

- Rock and Roll Rock music is something lots of people love and isare part of their lives., Yyet there was a time whenre churches banned this music while calling it “Satanic”. Rock and roll started in the early 1940s but didn’t become popular until mid 1940s-early 1950s, which was after the WWIIwar. The veterans were starting to settle down after the war for some peace but that short period of peace made people, especially the younger generation, restless. The economy was fine with no wars nor lack of money....   [tags: Rock music, Rock and roll, Youth, Blues]

Better Essays
1387 words (4 pages)

Essay about Rock Music : Rock And Roll

- Rock music has had its ups and downs over the past sixty or so years. It has gone from being seen as a sin or sexual term to a genre that has taken over the world and is not looking back. The genre had a unique beginning because it was the combination of jazz, gospel, blues, and western country music. Rock music also has its fair share of controversy, but it has many more bright points that have shaped the genre as a whole. With this being a new genre of music, many new ideas were brought into the music world that had never been thought of....   [tags: Rock music, The Beatles, Rock and roll, Blues]

Better Essays
1524 words (4.4 pages)

Essay on The World Is Flat, By Thomas Friedman

- Free College in the Flat World What if I told you there is a way to cut your school debt in half. If someone told you two years of college were free would you have more interest in attending. By making the first two years of college or community college free, this could become a reality. In Thomas Friedman’s book, “The World is Flat”, he explains modern globalization and how important education is. In modern culture, college is something that has shifted into something necessary to compete globally....   [tags: Higher education, College, The World Is Flat]

Better Essays
1242 words (3.5 pages)

Fixing a Flat Tire Essay

- Fixing a Flat Tire There aren't too many things in life which are more annoying than a flat tire when you least expect it, but then again who really expects a flat. Maybe the bloke driving around on four bald tires is expecting one, but he probably doesn't want one either. Although I will admit that one day on my way to get new tires I tried, and successfully I might add, to "burn off" a tire. Luckily for me though I was within one block of the tire shop, and even more serendipitously the police never caught me on the way there since I would stop for every red light and stop sign only to "light up" the rear wheels upon take off, sometimes reaching 75mph on the speedometer before the tires...   [tags: Flat Tire Driving Cars]

Better Essays
1482 words (4.2 pages)