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stratigraphic disorder at some scale is probably a common feature of the fossil record. "We define stratigraphic disorder as the departure from perfect chronological order of fossils in a stratigraphic sequence, in which an older fossils occurs above a younger one. This is the basis of relative datingįossils Out of Sequence Palaios June 1990 page 227
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The law of superimposition that the oldest fossils are found on the bottom is superseded by the law of decent with modification that the simplest fossils are the oldest and the youngest fossils are the most complex. The timeline established by the theory of Darwinian evolution ultimately determines the age of fossils found in any given strata. Relative dating is based on super imposition and fossils. ( The rocks do not date the fossils the fossils date the rocks American Journal of Science Jan 1976 47-55) Absolute dating is based on radioactivity. ( New Scientist page 425īoth absolute dating and relative dating are determined by the evolutionary timeline and are used to support the evolutionary timeline. Ager, Derek I can think of no cases of radioactive decay being used to date fossils. Scientific American Oct 1980 156-168 The rocks on the surface of the southern Appalachians are older than the sedimentary layers under them. The strata with the simpler fossils is presumed to older than strata with more complex fossils regardless of which is above the other. The deeper strata is presumed to be older than strata above. The age determined by relative dating is based on the rules of super imposition and the presumed age of strata based on fossils. The results are often determined by the estimates of the presumed age of the strata based on relative ages. These calculations are based on geological assumptions of uniform process, the lack of erosion of either the parent or daughter elements. The calculation are based on the percentages of parent, and daughter elements. The absolute dating is based on calculation of half life. An animal that is fast is more likely to be selected by nature to survive because they are more likely to be able to run away from their predator …show more content… People in society such as Henry Spencer and Sir Francis Galton saw that the theory of natural selection can apply to human affairs, as well.Absolute dating is actually a misnomer. Nature is able to select the best of these traits in animals to enable them to live in a certain area in the world longer. Basically, he argued that there are genes in certain members in the species that help them to survive. There are variations among members of a species, that are essential for survival, are selected naturally by nature, and these variations spread through the entire species through reproduction. He was influenced by the theory of Thomas Malthus that said the population is naturally growing faster than their food supplies, and he argued that chance difference among the members of species help some survive and some to die. He started to suggest how biological evolution might have occurred through his theory of natural selection that he explained in his book titled on the Origin of Species by the Means of Natural Selection. These animals were in an unending struggle for survival. These specimen started to make him doubt in creationism and instead he started to think that all life gradually evolved from a common ancestral origin. Social Darwinism and eugenics sprouted from the theories of natural selection and the survival of the fittest, and were popular and accepted among the upper middle class and the laissez-faire capitalists because were most successful and had a higher intellectual, economic, and social status than everyone else in …show more content… Charles Darwin during his five-year scientific cruise in Latin America and the South Pacific came across many different species of animals that he collected specimens from. Eugenics is a theory proposed by Sir Francis Galton that looked to improve the hereditary characteristics(genes), both physical and mental, of the human species. Social Darwinism is a social philosophy where people in society distorted and misinterpreted the theory of natural selection, originally suggested by Charles Darwin, and applied it to the human cultural system. Show More Social Darwinism/Eugenics Essay Ronahy Alzagha(Period 9)