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If the sample is freshly burned there will be no oxidizable carbon because it would have all been removed by the combustion process. Prehistoric and Historic Excavations at Site 9Gw347, Annistown Road Improvement Project, Gwinnett County, Georgia.

Over time this will change and the amount of organic carbon will decrease to be replaced by oxidizable carbon. [5] Kindall, Sheldon 1997 The Oxidizable Carbon Ratio (OCR) Technique: A New, Low-Cost Dating Method. New South Associates, Inc., Stone Mountain Georgia.

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Because these are assumed, we cannot have any confidence that the calculated age is correct.

Thus, scientists always compare their calculated result with what they think the answer should be.

The Oxidizable Carbon Ratio method was the subject of a Point–Counter Point feature of the Society for American Archaeology Bulletin in 1999. New South Associates, Inc., Stone Mountain, Georgia. New South Associates, Inc., Stone Mountain, Georgia. Cantley 1995 Archaeological Testing of Three Sites Along the SR 21, Effingham and Screven Counties, Georgia. 2005 Temporal Trends in Tchula Period Pottery in Louisiana. Submitted to Houston Archeological Society Journal Patterson, L.

There’s no bridge to Ocracoke – this small, barrier island is accessible only by private boat or plane, or by the state-run ferry service.

OCR is claimed to have been calibrated against radiocarbon and historically dated features, from which an equation relating OCR to calendar age (see below) has been derived. These two procedures are commonly used in soil analysis to characterize the organic carbon content in agricultural soils.

S Burr Oxidizable Carbon Ratio (OCR) dating is claimed by its inventor to be "an independent dating procedure. The extent of these changes is measured by the Oxidizable Carbon Ratio, which is defined as the ratio of organic carbon determined by a wet oxidation procedure to total organic carbon, as measured by a low-temperature loss on ignition procedure (Frink 1992, 1994, 1995, 1997). Black 1935 An Examination of the Degtjareff Method for Determining Soil Organic Matter, and a Proposed Modification of the Chromic Acid Titration Method. In graduate school, I analyzed archaeological soil features using various soil analytic techniques including the Ball, Loss-on-Ignition, and Walkley-Black wet oxidation procedures.

If their calculated age does not agree with expectations they will explain it away and look for something else to give them the age they need.

The article How dating methods work gives one example of how unwanted dates are explained away. All dating methods depend on something that is changing with time, plus they need a plausible initial condition.

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