Absolute Dating is a method in which the actual age of an object or stratigraphic layer is determined.
Relative Dating is a method in which it uses the absolute date to tie associated artifacts and layers into the sequence.
General Differances Between Relative and Absolute Dating Methods Getting dates for fossils that are found in sites being excavated by anthropologist is very important.
Dates show the evolution from early hominid specimens to our own species, Homo homo sapiens.
And though radiometric dating methods are rarely one hundred percent accurate, scientist and researchers are still willing to take the risk, for the sake of science or perhaps pure curiosity.By the time you have finished enjoying this exciting e Book, you can look at the picture above and easily figure out how, when and why these many human ancestors evolved and what characteristics they all had that were ultimately passed onto modern humans: us!If you have finished reading the e-textbook and are eager to keep up to date with the latest discoveries in human evolution and evolutionary genetics, use your web browser FIND or SEARCH button and look for the keywords BREAKING NEWS or NEW UPDATED DATA.Over long periods of time, these small pieces of debris are compressed (squeezed) and are buried under more and more layers of sediment that piles up on top of it.Eventually, they are compressed into sedimentary rock. A fossilized object has the same shape as the original object but is chemically more like a rock. Sediments have to accumulate over the organism in order to preserve it.At the end of this scientific ebook, are all the numerous sources I consulted, and my favourite websites and Twitter feeds on human evolution.If you own an i Mac or Mac Book and an i Pad, as I do, I suggest that you use the Mac Safari web browser to make a perfect PDF and export (or email) this PDF to your i Pad i Books app and read my HTML ebook on the go. Incidentally i OS 9 on the i Pad/i Pad Mini now actually allows you to save a webpage directly to i Books as a PDF: just open this webpage on i Pad Safari, click on the small box pointing upwards, then choose "Save PDF to i Books".When a anthropologist finds a fossil in a undistirbed layer of gray ash, you know that it is younger than the fossil in the layer of red ash below, and that fossil is younger than the fossil in the layer of brown ash below it.(Johanson 65) The basic theory here is that a certian site cantians a geolgical column key that is made up of differant strata layers, the fossils get older as they move down the key, and are found in differant layers of strata..(Scully 2) Relative dates have a couple of major problems.One is that the earth moves in many ways and this can distrube the layers of sediment putting younger fossils below older ones.The way in which chronological dating is acquired falls within two methods of examination: Absolute Dating and Relative Dating.(Michels 1973) Generally, scientists use both methods in combination and interrelation with another.There are many methods that can be used to acquire these dates, but all of these methods fall into one of two catorgories.They can either give a absolute date or a relative date.An absolute date is one in which you get an actual date in years. Relative dates do not give an actual date in terms of years, but they tell you if one fossil is older or younger than another fossil.