Recent research on seasonal effects on tree rings in other trees in the same genus, the plantation pine , has revealed that up to five rings per year can be produced and extra rings are often indistinguishable, even under the microscope, from annual rings.
It is clear that dendrochronology is not a clear-cut, objective dating method despite the extravagant claims of some of its advocates.
Extended tree ring chronology is not an independent confirmation/calibration of carbon dating earlier than historically validated dates, as has been claimed.
This procedure depends on temporal placement of fragments of wood using carbon-14 (C age and that also extends to a younger age.
A tree ring pattern that matches is found close to where the carbon ‘dates’ are the same. It assumes that it is approximately correct to linearly extrapolate the carbon ‘clock’ backwards. The closer one gets back to the Flood the more inaccurate the linear extrapolation of the carbon ‘clock’ would become, perhaps radically so.
No need to use tape to close as the two paper straws will form a very tight single straw when done right!
You may find that some cores are too long for one straw and require you to use two straws, right?Broken or decayed cores and be difficult to get into a sample straw.Use a knife blade to slice the straw end to end, then slip it over the core while it is still on the extractor/spoon.There are many points in a given sequence where a sequence from a new piece of wood matches well (note that even two trees growing next to each other will not have recognized that ring pattern matches are not unique.The best match (using statistical tests) is often rejected in favour of a less exact match because the best match is deemed to be ‘incorrect’ (particularly if it is too far away from the carbon-14 ‘age’).And so the tree-ring sequence is extended from the living trees backwards. Conventional carbon-14 dating assumes that the system has been in equilibrium for tens or hundreds of thousands of years, and that , chapter 4).