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The Carbon14 technique has been and continues to be applied and used in many, many different fields including hydrology, atmospheric science, oceanography, geology, palaeoclimatology, archaeology and biomedicine. Isochron methods avoid the problems which can potentially result during radiometric testing.

Be sure to see An Animated Isochron Diagram, or, Watching a Rock Age on an Isochron Diagram. Radiometric Dating from The Evolution Evidence Page.

[ While this may be true, a shrub in Tasmania could be 40,000 years old.

See Oldest Living Organism.] The Sheffield Laboratory now has a continuous master sequence for England going back to about 5000BC. This article should be a "must read" for any person interested in factualy accurate information on dating methods.

Overview of Methods Superposition Stratigraphy Dendrochronology Radiocarbon C14 Radiometric Dating Methods Obsidian Hydration Dating Paleomagnetic/Archaeomagnetic Luminescence Dating Methods Amino Acid Racemization Fission-track Dating Ice Cores Varves Pollens Corals Cation Ratio Fluorine Dating Patination Oxidizable Carbon Ratio Electron Spin Resonance Cosmic-ray Exposure Dating This is an excellent overview of dating methodologies, and is a chapter in a textbook on Archaeology.

You may find it useful for the clear definitions, and for excellent links on a variety of topic.

It excludes contamination and weathering of travertines and makes possible more precise dating of thin deposits of secondary carbonates.

No web-based resource for this method is available.

This is a relatively new method intended to to improve the precision of uranium and thorium istopy methods.

These tests have consistently given the same ages for each of these objects.

Examples of a number of consistent dates derived from different methods are given.

Hutton, a Scottish geologist, first proposed formally the fundamental principle used to classify rocks according to their relative ages.

He concluded, after studying rocks at many outcrops, that each layer represented a specific interval of geologic time.

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