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No two are exactly the same, but they often contain a wealth of evidence, including bison bones, arrowheads, tools, roasting pits, and fire-cracked rock. Two important questions archaeologists try to answer as they unearth a kill site are, "Who used this place? " Arrowheads and spear tips, called "points," can help provide an answer to the first question. Jack Fisher of Montana State University, the organic materials used to establish dates at the First Peoples site were wood charcoal (burnt wood from a campfire) and blowfly pupae cases. Radiocarbon dating of organic materials from the First Peoples Buffalo Jump revealed that it was used from about 900 AD until at least 1500 AD.Below: This diorama depicts the First Peoples Buffalo Jump. Archeologists have learned to recognize trademarks and differences between points designed by various Indian tribes and Paleoindian groups. A mass of hundreds (or thousands) of blowfly pupae were found with the bones of a bison forelimb that may have been discarded with muscle tissue still present. The styles of points found there match those from the pre-historic Avonlea and Old Women's cultures (ancestors of more recent Indian tribes).Above: Here is a small portion of the extensive cliffs at First Peoples Buffalo Jump near Great Falls (formerly called Ulm Pishkun).The cliff area is about 1500 meters long (almost 1 mile).Robbers and murderers along the public highways leading to every nook and corner of 31st street and first avenue.

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Most carbon consists of the isotopes carbon 12 and carbon 13, which are very stable.

Dating the Amesbury Archer was an important part of the overall archaeological research programme.

Samples of bone from both the Archer and his companion were AMS radiocarbon dated at the Oxford Radiocarbon Accelerator Unit, University of Oxford.

Because atmospheric carbon 14 arises at about the same rate that the atom decays, Earth's levels of carbon 14 have remained fairly constant.

Once an organism is dead, however, no new carbon is actively absorbed by its tissues, and its carbon 14 gradually decays.

World to see or worse yet, thought that the uncertainty.

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