For tree ring analysis to produce an accurate result, it is necessary to have samples of timber which retain their bark, so that it is clear which ring was outermost when it was felled.If only some sapwood remains (this is the outer layer of timber which lies beneath the bark and transports sap), the year in which the tree was felled can be estimated, probably to within 15 to 20 years.It becomes progressively easier to date timbers the more rings there are and the more samples taken.English Heritage recommends (2) that generally a minimum of 50 rings should be present in each sample and that eight to ten timbers should be sampled per building or per phase of the building's development, with no more than two core samples taken from the same timber to avoid unnecessary damage. Then the dimensions of each ring are measured under a microscope and the results recorded on both a graph and on a computer for statistical analysis.
Dendrochronology, or 'tree ring dating' as it is often known, can provide an invaluable insight into the history of a building by revealing the year in which the timbers used in its construction were felled.
This would mean they pre-dated the Flood which occurred around 4,350 years ago, taking a straightforward approach to Biblical chronology.
However, when the interpretation of scientific data contradicts the true history of the world as revealed in the Bible, then it’s the interpretation of the data that is at fault.
It was discovered early in the 20th century that trees of the same species in the same region displayed remarkably similar ring patterns across the tree trunk and in the end grain of timber beams.
Each year a tree gains another ring as it grows; the thickness of which depends on the amount of growth.
Samples should include the bark, and finding suitable timbers for examination may require dismantling part of the structure.