Dating of events from tree growth and wood structure
Elm in particular was used for this purpose as it resisted decay as long as it was kept wet it also served for water pipe before the advent of more modern plumbing. Such situations occur mainly where old rocks have been locally heated, which released argon into pore spaces at the same time that new minerals grew. In a single rock there may be mutually contaminating, potassium- bearing minerals. No satisfactory explanation can as yet be given for the exact mechanisms determining the formation of earlywood and latewood. The rates of exchange that would mess up the dates are very tiny.
These fibers are the elements which give strength and toughness to wood, while the vessels are a source of weakness. There may be evidence of heating, but the date may be accepted, and there may be no such evidence, but a hypothetical heating event is assumed anyway. The same goes for extrusive flows on the surface, since argon would be filtering up through the earth and through the lava as it cooled. Why methods in general are inaccurate I admit this is a very beautiful theory. The original element is called the parent, and the result of the decay process is called the daughter element.
One could say that we can detect whether the daughter is embedded in the crystal structure or not. Heating of rocks can also release argon. This will make it more difficult to detect this added argon by the spectrum test described below. In areas where tremendous tectonic activity has taken place, highly discordant values for the ages are obtained. Aside from water, wood has three main components.
But it's not evident how much support this gives to radiometric dating. These anomalies are reported in the scientific literature. Argon is released from lava as it cools, and probably filters up into the crust from the magma below, along with helium and other radioactive decay products. Specifically, he quotes one of his anonymous friends that claims that argon easily diffuses from minerals p.
The problem with this approach is that it leaves ample room for the exercise of subjective judgment and evolutionary assumptions. Thus the temperature does not have to be very high for argon to move through rock. Here not only strength, but toughness and resilience are important. In addition, some kinds of rocks are not considered as suitable for radiometric dating, so these are typically not considered. Wood Diagram of secondary growth in a tree showing idealised vertical and horizontal sections.
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