Wrong Weathering Lab Report

Overall the plate tectonics theory does seem valid as there is lots of evidence to prove it right. For example fossils on either side of the ocean, climates being the same in different continents and hot spots. But there are some stronger pieces of evidence like the ring of

This researcher proposes that the dinosaurs did not die of heat, in fact she thinks the opposite, that they froze to death instead. Both articles have the same idea about a meteorite hitting the earth yet there is no concrete evidence as to what caused the meteorite to strike and what it did when it got here.

The theory of plate tectonics was first developed by Alfred Wegener. He concluded that the continents seem to have a similar shape and could potentially fit together. This suggested that they were at one time joined together as part of 2 super continents called Gondwanaland and Laurasia was in the north. This theory was said to be proven by the discovery of fossilised remains of a mesosaurus that were found on the coasts of Brazil and Gabon. Sea floor spreading is another theory that supports the idea of plate tectonics; this theory discovered that rock is being formed under the ocean as a new sea floor. Sea floor spreading was shown in the Atlantic, where it is believed the Eurasian and North American plates are moving apart on a

The fossil deposits at the Chicxulub site suggest that the mineral layer in the crater was deposited after the impact, but before the extinction of the dinosaurs and other species. Keller proposes two possible explanations for this. The first explanation is that the sediments were deposited as the backwash of a giant tsunami that occurred after the impact (Keller 2004).

He narrowed his hunt down to a location in Denmark, where he had sent a colleague to perform an iridium analysis test at ("Asteroids and Dinosaurs: Unexpected Twists and an Unfinished Story," n.d.). When the results came back, Alvarez knew that whatever happened had not been a small-scale disaster. Once again, Alvarez was back to asking questions. What caused the increased iridium levels at the KT boundary? Except this time, he realized that his observations supported the ten year old hypothesis that had been proposed by paleontologist Dale Russell and physicist Wallace Tucker ("Asteroids and Dinosaurs: Unexpected Twists and an Unfinished Story," n.d.). They brought up the possibility of a supernova being the cause of dinosaur extinction. Supernovas are known to release high amounts of iridium, so such a hypothesis fit perfectly with Alvarez’s team’s discovery. However, the hope of having found a conclusion was short-lived. Luis Alvarez had mentioned that if said supernova had occurred that it would have released amounts of plutonium which would have been found alongside the iridium; no plutonium was found at either site. After more digging, the team came up with a new hypothesis ("Asteroids and Dinosaurs: Unexpected Twists and an Unfinished Story," n.d.). Perhaps an asteroid had struck Earth towards the end of the Cretaceous period, blowing enough dust into the atmosphere to

The author and his colleagues specifically chose to focus on 375 million year old rocks in their search for fossils because this was the time frame that provided fish that would be useful to study from. The 385 million year old rocks provided fish that look too similar to the ones we have now and the 365 million year old rocks have fossils that don’t resemble fish. The 375 million year old rocks, however, provide fossils that show the transition between fish and land living animals.

H2o co2 and h2co3 help in the dissolution of limestone and which produces bi carbonate which helps in the forming of caves and landscapes.

In the following space, explain the role of fossils in developing the Geologic column. Your explanation must be between 200 and 300 words.

Sedimentary rocks interpret dinosaur habitats through encased environmental structures of the past. Through sedimentary rocks, paleoecologists’ can examine the arranged formation of sedimentary structures to specify what type of environment the dinosaurs’ lived in. An example of a specific sedimentary rock structure can be seen through formed weathering and ripple marks by how wind and sand formed distinct patterns in the past layered sediment. These arrangements provide interpretations on the structure of the sediment and the habitat of encased fossils, through modern day comparisons

The reading passage proposes three theories which support the idea that a dinosaur which is called edmontosaurus survived in the winter by migrating to the south, the more hospitable region than the extremely cold in the North Slope. However, the professor in the listening respectively contradicts each theory in the reading passage by using strong evidence as support.

At the time, although it was understood that fossils were the hardened remains of dead animals, it was not yet accepted that these animals might be extinct species from hundreds of millions of years ago. So, when Anning showed up with a giant marine reptile fossil (the world’s first Ichthyosaur) it caused quite a stir, because at the time the Bible was widely used for interpreting scientific ideas and religion ruled people’s lives. Hence Anning’s findings encouraged the largely creationist population, to rethink the history of the Earth. Her fossils had helped scientists understand how things

The author and his colleagues chose to focus on 375 million year old rocks in their search for fossils because amphibians that look dissimilar to fish were discovered in 365 million year old rocks, while fish without amphibian characteristics were discovered in 385 million year old rocks. Thus, it is possible that the evolutionary intermediary, or the “missing link” between fish and amphibians, would be discovered in 375 million year old rocks, between the two time periods. The rocks examined were sedimentary in composition, as the gradual and relatively gentle formation of sedimentary rock under conditions of mild pressure and low heat are conducive to the fossilization of animal remains. Sedimentary rock is also often formed in rivers and seas, where animals are likely to live. This site provides a resource that describes means by which fossils are formed and how the fossil record may be interpreted, and shows some examples of fossils demonstrating evolution through geological periods: http://www.fossilmuseum.net/fossilrecord.htm. In 2004, Shubin and his colleagues were looking for fossils on Ellesmere Island, in northern Canada. This location was chosen because of its lack of human development, as well as of obstructing natural formations and life forms such as trees, which

Glaciation that are widespread can be identified based on the subglacial tillite, which is a thick layer of sediments that settle down beneath glaciers or ice caps. On top of this subglacial tillite layer is deposited marine carbonate, also known as cap carbonate. Based on their paleolatitude designated by glacial sediments’ paleomagnetism, it can be determined that these deposits are from equator region. The interaction between two types of sediments, marine (like carbonate) and subgacially deposited sediments, indicate that the glaciers had approached marine coastlines.

Discussion and Conclusion: I hypothesized that the four limestones being introduced to the four different solutions used in this chemical weathering lab would weather at different rates. First, in cup one, it was hypothesized that the 50% vinegar solution will have the greatest amount of chemical weathering on the limestone, because the 50% vinegar solution is the strongest and most like actual acid rains. Next, in cup two, it was hypothesized that the 10% vinegar solution will have less chemical weathering effects than cup one, because the 10% vinegar solution has less chemical weathering strength compared to the 50% solution. Additionally, in cup three, it was hypothesized that the soda water solution will have less chemical weathering

Jerry Valente Earth Science 1 11/10/17 Chemical Weathering Background Information Chemical weathering occurs when the erosion of rocks and the disintegration of rocks are caused by chemical reactions with water and substances dissolved in it. This can occur in places where rainfall is common, it occurs more rapidly at higher temperatures. Since high temperatures and damp areas cause the chemical weathering process to increase, you can infer that chemical weathering occurs more frequently in the spring. There are different types of chemical weathering, the three big ones being solution, hydrolysis, and oxidation.