1. The author and his colleagues wanted to use 375 million old rock, because in the 385 million year old rocks they found what look like fish. In the 365 million year old rocks they found amphibians that did not look like fish, so to find the change the look at the 375 million year old rock to find transition between the two. In their paleontology work in 2004 they found sedimentary rocks in Pennsylvania and on the east coast of Greenland, but their most successful rock was found in the Artic of Canada.…
Tectonic plate’s movement creates ocean basins, mid-ocean ridges, through collision. Colliding plates push sedimentary materials into an uplifted mass of rock that contains numerous folds and faults. The Earth has undergone a number of mountain building periods. The process of creation is first by the accumulation of sediments then the tectonic collision causes rock deformation and crystal uplift and finally the isocratic rebound continues to cause uplift despite erosion and causes the development of new mountain peaks through block faulting.…
Fossils are the remains of animals, plants and insects that lived millions to hundreds of thousands of years ago. When an animal in that time period died its bones were left on the ground. Over thousands of years organic matter or soil covered those bones. As the bones get covered the minerals in the soil replace the composition of the bones in to something else. Over The ages heat and pressure from the above layers turn those minerals in to stone. The animal’s bones are now stone but still are in the shape of the original bones therefore producing a…
The study of fossils is helpful to know in understanding evolution, as it teaches us about our…
explains that the fossils are found in layers and not one spot is there fossils that cross…
Continuous shifting and folding of the earth’s crust formed the Appalachians, Rockies, and other huge mountain ranges.…
Today, I am going to attempt to explain why; the Articles of Confederation was changed to the U.S. Constitution. On November 15, of 1777 the Articles of Confederation served as the written document that established the functions of the national government of the United States after it declared independence from Great Britain. (HTT5) Approval of the Articles of Confederation by all thirteen states did not take place until March 1, 1781. The Articles created a loose confederation of sovereign states and a weak central government, leaving most of the power with the state governments. (HTT6) later it was noticed that the Articles of Confederation would not be enough to keep the nation together. Congress did not have the power to tax or regulate…
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. Sedimentary rocks are the type of rock that preserves the fossils. Limestone, siltstone, shale, and sandstone are examples of this. The reason why these rocks are the best at preservation is because they are formed by a process that includes the movement of lakes, rivers, and seas. A rock in a body of water has the potential to fossilize because after the gradual compression on the layers in the body of water forming, chemical processes are still happening.…
Another wonderful geological phenomenon is the park’s variety of mountains and their ranges. From the Pinto mountains to the Hexie mountains, their rocks are a sight to see. You can tell by these exposed granite monoliths that immense earth forces were the cause for their shape and formation. Hills formed by rock piles made of pinkish monzogranite, also share a story of formation and geological history. These rocks are formed…
There are attributes of sedimentary rocks that indicate the environment in which they formed: color of rock, clast size, shape and sorting, types of bedding, fossils etc. These types of sedimentary rocks are important because they help us understand the geologic history of Earth, climate change and how life originated. As for metamorphic rocks, these are formed when sedimentary rocks are subject to change in temperature, pressure or both. Interesting to know, that sedimentary rocks will produce different kinds of metamorphic rocks, even if metamorphosed at the same grade. For example, shale when metamorphosed at low temperature can develop cleavage and become slate. Also, as we learned in class limestone consists mostly of calcite, which is a chemically reactive mineral, if metamorphosed in low grade it will cause calcite to form fine crystalline marble. In regards of plate tectonics, these are 14 slabs that make our planet and are constantly moving which play a…
According to the Great Archaeology; History of Archaeology’s online glossary, the definition of a fossil is "the recognizable remains such as bones shells or leaves other evidence tracks burrows impressions of past life on Earth." In more simple terms, a fossil is the preserved evidence of structured organic material that once lived on earth. The same glossary defines a mummy as "a corpse whose skin and organs have been preserved by either intentional or incidental exposure to chemicals, extreme coldness, very high humidity, or lack of air when bodies are submerged in bogs." In summary, a mummy is structured organic material (a human, animal, insect, etc.) that humans or nature has preserved. Therefore, a mummy is a fossil because, the definition of a mummy, fits into the definition of a fossil.…
I have always loved fossils, and the discovery of what the fossils bring to us today, so I thought I would find out some information about fossils. I found an article about fossils and penguins. I love penguins and find them unique and interesting.…
Did you ever want to be paleontologist, now you can. Fossils are the oldest rocks on earth. They can be anything that was over 4,000 years ago. Fossils are what tell us what come before humans a million years ago.…
Absolute dating methods are used to determine the age of materials. We need to understand how fossils are made so we can date them properly. There are five ways bones are fossilized. They are by permineralization, unaltered preservation, carbonization, authigenic preservation, and recrystalization (Shepherd). When a fossil is found you need to make sure that it can be preserved properly so it can stay in the same shape to enable research. Many steps are taken to prepare fossils and conserve them. Hardeners are used to protect against deterioration, adhesives are used to put all the pieces together, and there is a lot of mechanical preparation to clean the fossil. After the fossil is well cleaned you can examine it accurately (Paleontological Resources For Fossil Collectors). You also always…
One of the types of rocks that can be found on the Earth are sedimentary rocks. There are two other kinds which are igneous and metamorphic rock. Sedimentary rocks cover about 75 to 85 % of the land on Earth. When pieces of rock or parts of once- living organisms or minerals from precipitation deposit and solidify on Earth’s surface they for sedimentary rocks. (Murck, et al., 2008) In addition, the way the plate tectonics move, can significantly affect sedimentation and the formation of sedimentary rocks.…