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

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With the cumulative experience of centuries of paleontological research, the chronology of many fossil species are well established in context of both geologic time and distribution.

Biostratigraphy is the science of correlation of sedimentary units base on the identifiable fossils they contain.

Combining these dates firmly place the Rhynie cherts and sediments as Early Devonian (see the geological timescale below) and more specifically Pragian in age, although at present an earliest Emsian age cannot be entirely ruled out.

Above: Simplified geological timescale with dates (Ma: Millions of years before present) highlighting the subdivision of the Devonian period.

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

A geologic map or report typically is only a summary of investigations that frequently involve the collecting and processing of hundreds of rock samples, followed by the evaluation and interpretation of data from a variety of analytical techniques.

Paleontology is the study of life in past geologic periods (fossil plants and animals), incorporating knowledge of an organism's phylogeny, relationships to existing organisms, and correlation to an established chronology of Earth History.

Paleontology is limited to the study of sedimentary deposits where fossils are preserved, but can be used in establish relative ages of nearby igneous intrusion, faults, and other geologic features.

The age of the Rhynie chert and it's associated sediments has been calculated by combining two analytical methods: absolute dating and biostratigraphy.

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