Sedimentary dating

01-Nov-2016 17:52

The most obvious feature of sedimentary rock is its layering.This feature is produced by changes in deposition over time.The atoms of some chemical elements have different forms, called isotopes.These break down over time in a process scientists call radioactive decay.Each original isotope, called the parent, gradually decays to form a new isotope, called the daughter.Each isotope is identified with what is called a ‘mass number’.AA(School of Aquatic Science and Natural Resources Management, Deakin University, Warrnambool, Victoria 3280, Australia), AB(The N. Macintosh Centre for Quaternary Dating, University of Sydney, N. Overall there was considerable agreement between methods although not all were applied to each site. Migration of radionuclides between groundwater and shells introduced large errors at one site and led to appreciable uncertainties at others.

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Although there might be some mineral differences due to the difference in source rock, most sedimentary rock deposited year after year look very similar to one another.With out individual time stamps the process of dating these structures could become extremely difficult.

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