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However, it quickly became clear that something wasn’t quite right.‘As is always the case, a new dating technique comes along and everyone latches onto it,’ explains Walker.

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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.

Geochronology is the science of dating and determining the time sequence of events in the history of the Earth.

This web page provides an overview of selected geochronology methods used by USGS scientists.

These techniques can be grouped as numerical, relative dating, and correlation.

Numerical techniques are best, but datable materials are often lacking, and in these cases age estimation must be made using relative-dating or correlation techniques.

New dating methods are invented all the time, however, most have practical limitations.

Geologic research and mapping requires the determinations of the ages and composition of rocks.

Adequate age control is thus a limiting factor in studies of active tectonism.

About 26 dating techniques can be applied to dating deposits and deformation of late Cenozoic age (past few million years).

Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.

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