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It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.
Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.
I work in the field of soil science as an agronomist in the North Island of New Zealand, which has a lot of volcanic based soils such as the pumice based soils from the world’s biggest eruption in 2000 years which formed Lake Taupo around 130 , and formed a new layer of topsoil over many hundreds of square miles.If you believe the earth to be around 6,000 years old, I invite you to visit a road cutting on Ashpit Road on the shore of Lake Rerewhakaetu if you ever get to NZ, where you can see many layers of top soils and volcanic horizons that have formed over the last 25,000 years.Also some of the volcanic soils are highly weathered, compared to recent volcanic soils of the Taupo eruption.The Oxalic acid standard was made from a crop of 1955 sugar beet. The isotopic ratio of HOx I is -19.3 per mille with respect to (wrt) the PBD standard belemnite (Mann, 1983). T designation SRM 4990 C) was made from a crop of 1977 French beet molasses.The Oxalic acid standard which was developed is no longer commercially available. In the early 1980's, a group of 12 laboratories measured the ratios of the two standards.