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Ranking and Scaling produces optimum biozonations, whereas CASC produces correlations with uncertainty limits. The programs use a minimum of fossil distribution data to achieve a maximum of stratigraphic resolution. Event variance analysis tests the difference between observed and stratigraphically expected positions, and models the difference between average and total stratigraphic range of events.

The current version is RASC & CASC 20, download it here.

RASC & CASC copyrighted by F.P.Agterberg and F.M.Gradstein, 1998-2007.

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