The Grand Canyon is a wonderful place to gain a sense of how old the earth really is because of the ability to date the layers of rock in the canyon. The Rocks exposed in Grand Canyon are truly ancient, ranging from 1840 million years old or 1.84 billion years old (to 270 million years of age. (Beus, and Morales, 2003). While the Grand Canyon is not old in comparison to much of the earth, it is considered young earth because it was slivered by an ie in the last six million years. This gives the rocks in the Canyon Ice age fossils and new deposits, in the grand scheme of things. Some of the younger deposits in the Canyon are only a thousand years old and are the result of lava that began to come into the geographic. It is the walls of the Canyon that hold strong fossil recording. Originally these rocks formed in environments that were different from the one that is in Arizona now. There are three era of rocks in the Canyon and each is different. This paper will explore the three ages of rock, and look at “old earth” and the “young earth” as it is recorded in the Canyon, while also seeing how this is determined.
The first layer of rock that this paper will examine is known as the Vishnu Basement Rocks and is Precambrian. They are recrystallized as a result of heat and pressure, and igneous. This means they were exposed to fire. (Dehler, et al, 1999) These stones are found along the Granite Gorge. They were formed by colliding as a result of volcanic action and the heat from that formed the igneous rock. Mountains were formed along the top of the rock. These are like basement rocks to the mountains on top of them. They are the oldest rocks in the Canyon. The rocks are located in what is called the “Inner Gorge” and there are at ...
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The Starved Rock Member of the Saint Peter Sandstone is preserved as a northeast-southwest trending belt of strata that is ...
The paper talked about the new mud glyph cave art site the was discovered in northern Alabama. It is believe that the artifacts and the images that is located in the cave linked back to the Early and Middle Woodland periods. The cave was named “19th Unnamed Cave” by a naming system that was used be University of Tennessee. Other main points in this paper include the 19th Unnamed Cave, the mud glyph art that it contains, and how the mud glyph contributes to the understanding of mud glyph assemblage preservation, and it helps illuminates the chronological placement of the art form. The cave is located in northern Alabama with a cave mouth of 25 m in diameter and with more than 5 km of underground passageways.
The site visited on this day was informally known as the Bedrock Knob (NTS grid reference: 120 342). It is in an area where patches of limestone and exposed bedrock are common. The bedrock is part of the Preca...
...e morphed it into the quartzite that is seen surrounding the butte (4). Rocks that undergo this process are called metamorphic rock, which is the same as the rock seen years ago by dinosaurs and other extinct creatures. The quartzite rocks were formerly seafloor sediment that was forced upwards, and then surrounded by lava basalt flows. Once erupted through fissures and floods through out most of the area, lava flow eventually created enough basalt to form a thickness of about 1.8 kilometers (1). All of this basalt flow eventually led to the covering of most mountains, leaving the buttes uncovered. The igneous lava flows and loess is reasons that the Palouse consists of such sprawling hills, and rich soil for farming (2). In result of the lava flows, the Precambrian rock Quartzite was formed. And lastly covered by the glacial loess, which were carried by the wind.
The Franciscan Terrane of central California represents an accretionary complex formed by long-term subduction of an oceanic plate under the Western margin of the North American craton. The Franciscan complex is composed of three distinguishable belts: the eastern belt (Yolla Bolly and Pickett Peak terranes), the central belt, and the coastal belt. Age and metamorphic grade of the belts decreases to the west (Blake and Jones, 1981). Formation of the accretionary complex began during the late Jurassic in the eastern belt and has continued into the Miocene along the western coastal belt. The complex trends NNW and is bounded by the San Andreas Fault to the east and by the coastal range fault to the west. The coast range fault separates the Franciscan complex with the partly coeval Great Valley sequence. Debate exists over the tectonic evolution of the Franciscan, centered around the geographic origin of the Franciscan rock units.
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The geological arrangement was largely influenced by the Western Interior Seaway, which swept through the continent millions of years ago. It was during this time when frequent alterations in climate caused the waters to surface and withdraw. The Dakota Sandstone deposited within the sedimentary profile of Mesa Verde is in large part due to these events.
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