Assumptions to carbon 14 dating
This can be done very accurately, although some samples may be difficult to work with.Beyond this, the accuracy of the date depends on the reliability of the assumptions used in interpreting the measurements (see below).Why do ancient samples of coal, diamonds and other carbon-containing materials consistently contain  The first such curve was published by: Arnold, JR and WF Libby. High-precision (super 14C measurement of Irish oaks to show the natural 14C variations from AD 1840 to 5210 BC. Age determinations by radiocarbon content: Checks with samples of known age. Subsequent revisions have been made, e.g., Reimer, PJ et al. Int Cal09 and Marine09 radiocarbon age calibration curves, 0-50,000 years cal BP.  This was the scroll “Testament of Qahat,” for which the radiocarbon date was about two centuries older than the date based on paleography. Evolutionists have long used the carbon-14, or radiocarbon, dating technique as a “hammer” to bludgeon Bible-believing Christians.
It is not used to date rocks or other inorganic material.Other processes may affect the local concentrations of carbon-14.These effects are corrected for by comparing samples from different locations. Violations in the atmosphere result from volcanic eruptions that occasionally add C.Also, there is a lag time for atmospheric mixing in the northern and southern hemispheres which results in somewhat different ages for the two hemispheres.