By collecting abundant samples in three areas along an environmental gradient, the project will assess the impacts of different environments on the age and availability of fuelwood resources.
The construction of local multi-species multi-century tree-ring chronologies will be particularly important for dating of Fremont, Gateway Tradition, and Ute sites in western Colorado and eastern Utah, and may be critical in understanding Fremont/Ute relationships and Ute ethnogenesis.
Old wood problem radiocarbon dating
It was 1984 and the Edgar Cayce Foundation, named for an early twentieth-century psychic who claimed that the Sphinx and Khufu's Great Pyramid were built in 10,500 B. Old friends and supporters of the deceased psychic had visited Giza in the early 1980s and several of them were willing to put their beliefs to the test by radiocarbon dating the Great Pyramid. and built the Giza Pyramids in a span of 85 years between 25 B. In spite of this discrepancy, the radiocarbon dates confirmed that the Great Pyramid belonged to the historical era studied by Egyptologists.
Archaeologists believe it is the work of the Old Kingdom Dynasty 4 society that rose to prominence in the Nile Valley from ca. In dealing with the 374-year discrepancy, we had to consider the old wood problem.
With the support of the National Science Foundation, Dr. Towner, colleagues and students will examine the 'old wood' problem in radiocarbon dating of archaeological sites in western Colorado and eastern Utah.
The old wood problem is the tendency for radiocarbon (14C) determinations from wood charcoal to be significantly older than the contexts in which the charcoal is found.
Alternatively, if our radiocarbon age estimations were in error for some reason, we had to assume that many other dates obtained from Egyptian materials were also suspect. Samples were also taken from our excavations at Giza where two largely intact bakeries were discovered in 1991.
The calibrated dates from the 1995 Old Kingdom pyramid samples tended to be 100 to 200 years older than the historical dates for the respective kings and about 200 years younger than our 1984 dates.Living organisms are constantly incorporating this C-14 into their bodies along with other carbon isotopes.When the organisms die, they stop incorporating new C-14, and the old C-14 starts to decay back into N-14 by emitting beta particles.Some organic materials do give radiocarbon ages in excess of 50,000 "radiocarbon years." However, it is important to distinguish between "radiocarbon years" and calendar years.These two measures of time will only be the same if all of the assumptions which go into the conventional radiocarbon dating technique are valid.The number of dates from both 19 was only large enough to allow for statistical comparisons for the pyramids of Djoser, Khufu, Khafre, and Menkaure. First, there are significant discrepancies between 19 dates for Khufu and Khafre, but not for Djoser and Menkaure.