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The scholar most associated with the rules of stratigraphy (or law of superposition) is probably the geologist Charles Lyell.The basis for stratigraphy seems quite intuitive today, but its applications were no less than earth-shattering to archaeological theory.For example, JJA Worsaae used this law to prove the Three Age System.For more information on stratigraphy and how it is used in archaeology, see the Stratigraphy glossary entry.The half-life of C is approximately 5730 years, which is too short for this method to be used to date material millions of years old.

A submethod within biostratigraphy is faunal association: Sometimes researchers can determine a rough age for a fossil based on established ages of other fauna from the same layer — especially microfauna, which evolve faster, creating shorter spans in the fossil record for each species.In other words, artifacts found in the upper layers of a site will have been deposited more recently than those found in the lower layers.Cross-dating of sites, comparing geologic strata at one site with another location and extrapolating the relative ages in that manner, is still an important dating strategy used today, primarily when sites are far too old for absolute dates to have much meaning.Carbon-14 is also passed onto the animals that eat those plants.After death the amount of carbon-14 in the organic specimen decreases very regularly as the molecules decay.




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You indulge in magical thinking, often consumer-based, before the date. Buying and wearing this overpriced Gwynethy cardigan. If you go on a dinner date too early for your comfort level, you can hardly eat and the guy assumes you have an eating disorder. But for now, you scare the shit out of me, so I'm slowly nibbling on a lettuce leaf with fear in my eyes. You drink to calm your nerves, and since you can't really eat (see above), you get really shitfaced really fast. Even if you have pre-planned (#3), these things do slip your mind occasionally.


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Again, anyone with five minutes of business experience already knows the answer, statistically speaking. But I doubt most of them know the percentage of fakes. I have seen a few dating sites this year with 95% fakes (quite obviously), so wait for more on this story.


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