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Chronometric techniques include radiometric dating and radio-carbon dating, which both determine the age of materials through the decay of their radioactive elements; dendrochronology, which dates events and environmental conditions by studying tree growth rings; fluorine testing, which dates bones by calculating their fluorine content; pollen analysis, which identifies the number and type of pollen in a sample to place it in the correct historical period; and thermoluminescence, which dates ceramic materials by measuring their stored energy.
Scientists first developed absolute dating techniques at the end of the 19th century.
New discoveries have filled in the gaps, and shown us in unimaginable detail the shape of the great ‘tree of life’.
Darwin and his contemporaries could never have imagined the improvements in resolution of stratigraphy that have come since 1859, nor guessed what fossils were to be found in the southern continents, nor predicted the huge increase in the number of amateur and professional paleontologists worldwide.
After all, a clock would not give the correct time if it were to dramatically speed up or slow down. Not Billions, Institute for Creation Research, 2005, and visit
A group of scientists participating in the RATE (Radioisotopes and the Age of the Earth) project has recently uncovered several lines of evidence, which confirm that decay rates have not always been constant and were faster in the past: The RATE researchers suggest that the accelerated decay happened at two different times in earth’s history—during the initial creation event, and during the Flood. Relative ages are assigned to rocks based on the idea that the layers that are lower in the strata were deposited before rock layers that are higher.
Now imagine that you come upon a formation like this: What do you think of it? How can you make any conclusions about rock layers that make such a crazy arrangement?A major assumption of any radioisotope dating method is that the decay rate of a given isotope (an atomic nucleus with a given number of neutrons) is constant—that it has always been what it is today.Radioisotope methods can only be used to estimate a reliable age if nuclear decay rates have always been constant.Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.These skeptics do not provide scientific evidence for their views.
This is known as the Law of Superposition and can be applied to layers that are found in one location and are continuous; however, it cannot easily be applied across the board to layers found scattered around the world.