Carbon dating th process
Over time this will change and the amount of organic carbon will decrease to be replaced by oxidizable carbon.  Kindall, Sheldon 1997 The Oxidizable Carbon Ratio (OCR) Technique: A New, Low-Cost Dating Method. New South Associates, Inc., Stone Mountain Georgia.
By measuring the ratio of oxidized carbon to organic carbon (the OCR) and applying it to the following equation the age of the sample can be determined with a very low standard error. Data Recovery Excavations at the Maple Swamp (38HR309) and Big Jones (38HR315) Sites on the Conway Bypass. Burr 1999 Point/Counterpoint: Failure to Discriminate: Querying Oxidizable Carbon Ratio (OCR) Dating. The Steward: Collected Papers on Texas Archeology -94. Submitted to the Gwinnett County Department of Transportation, Lawrenceville, Georgia and Moreland Altobelli Associates, Atlanta, Georgia. 1999 Cronologia Obtenida por la Tasa del Carbono Organico Oxidable (OCR) en Markatch Aike 1 (Cuenca del Rio Chico, Santa Cruz).
This process of ingesting C-14 continues as long as the plant or animal remains alive.
The C-14 within an organism is continually decaying into stable carbon isotopes, but since the organism is absorbing more C-14 during its life, the ratio of C-14 to C-12 remains about the same as the ratio in the atmosphere.
Radiocarbon, or Carbon-14, dating is probably one of the most widely used and best known absolute dating methods. Radiocarbon dating relies on a simple natural phenomenon.
This allowed for the establishment of world-wide chronologies.
The method is experimental, and it is not as widely used in archaeology as other chronometric methods such as radiocarbon dating. Pollan 1995 Excavations at Site 41WH24, Wharton Co., Texas.
The unstable isotope is brought to Earth by atmospheric activity, such as storms, and becomes fixed in the biosphere.In the end, Frink concludes that the OCR method—like any scientific advance—warrants further study, and he points out that even the now venerable "scientifically acceptable" method of radiocarbon dating was much maligned when it was first introduced. Abbott 1997 Fort Polk, Louisiana: A Phase I Archaeological Survey of 14,622 Acres in Vernon Parish. (1998) National Register Eligibility Assessment of Four Sites on Upper Roubidoux Creek (23PU483, 23PU458, 23PU354, 23PU264), Fort Leonard Wood, Missouri. Submitted to the United States Army Construction engineering Research Laboratories (USACERL), Champaign, Illinois. Bulletin of the Massachusetts Archaeological Society 60(1). Submitted to the Panola County Industrial Authority.