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Seriation stratigraphy and index fossils the backbone of archaeological dating

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Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.These skeptics do not provide scientific evidence for their views.It describes new tools such as lithostratigraphy, biostratigraphy and event stratigraphy and then interprets those events in terms of their "reasonableness" as a whole (the study of facies and their biological remains).The statigraphic record represents the history of processes and events that occurred at the surface of the earth.the determination of the chronology of events studied from archaeological data.Two systems of archaeological dating are used: absolute and relative chronology.Contextual seriation is often used for reconstructing the chronological sequence of graves as only the presence or absence of a design style or type is important.

Darwin and his contemporaries could never have imagined the improvements in resolution of stratigraphy that have come since 1859, nor guessed what fossils were to be found in the southern continents, nor predicted the huge increase in the number of amateur and professional paleontologists worldwide.An example are assemblages of pottery sherds each including roughly the same range of types though in different proportions.Flinders Petrie excavated at Diospolis Parva in Egypt in the late nineteenth century.Early geologists, in the 1700s and 1800s, noticed how fossils seemed to occur in sequences: certain assemblages of fossils were always found below other assemblages. Since 1859, paleontologists, or fossil experts, have searched the world for fossils.In the past 150 years they have not found any fossils that Darwin would not have expected.The seriation method works because object styles change over time; they always have and always will.A good example of a change in artifact type is the development of hand-held PDAs from those first enormous cell phones. As an example of how change through time works, consider the different music recording methods that were used in the 20th century.Seriation is a standard method of dating in archaeology.It can be used to date stone tools, pottery fragments, and other artifacts.The stratigraphic method, which observes the sequence of earth strata containing artifacts, makes it possible to attribute each stratum to a definite epoch. The typological method is based on the fact that the types of objects and the material from which they were made were different in various historic epochs.The transition from relative to absolute chronology is possible when undated objects are found together with objects whose time of manufacture is known or with coins or inscriptions and when studies are made of remains that have been dated from written sources.