Easy dating method

For example, it has been known since the 1960s that the famous Cretaceous-Tertiary boundary, the line marking the end of the dinosaurs, was 65 million years old.

Repeated recalibrations and retests, using ever more sophisticated techniques and equipment, cannot shift that date. With modern, extremely precise, methods, error bars are often only 1% or so.

Since then, geologists have made many tens of thousands of radiometric age determinations, and they have refined the earlier estimates.

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In the past 150 years they have not found any fossils that Darwin would not have expected.

New discoveries have filled in the gaps, and shown us in unimaginable detail the shape of the great ‘tree of life’.

These skeptics do not provide scientific evidence for their views.

Current understanding of the history of life is probably close to the truth because it is based on repeated and careful testing and consideration of data.

The rejection of the validity of fossils and of dating by religious fundamentalists creates a problem for them: Fossil sequences were recognized and established in their broad outlines long before Charles Darwin had even thought of evolution.

Early geologists, in the 1700s and 1800s, noticed how fossils seemed to occur in sequences: certain assemblages of fossils were always found below other assemblages. Since 1859, paleontologists, or fossil experts, have searched the world for fossils.

The method developed here by the addition of another assumption (which can be tested) allows AD's to be compared using Student's -test.

Hence, sample preparation and measurement procedures can be tested for equivalence.

It is generally recognized that estimates of accumulated dose (AD) for ESR dating are vulnerable to variations in sample preparation and measurement procedures: it is therefore desirable to be able to compare AD's derived by different methods as a first step in establishing universally acceptable methods.

However, because AD is calculated by dividing two variables, the distribution of AD is non-linear and standard linear hypothesis tests cannot be applied directly.

Some critics, particularly religious fundamentalists, argue that neither fossils nor dating can be trusted, and that their interpretations are better.

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