Stratigraphic framework and time slices / Barry D. Webby ... [et al.] -- Calibration of the Ordovician timescale / Peter M. Sadler, Roger A. Cooper -- Measures of diversity / Roger A. Cooper -- Major ...
Palaeontology is the study of prehistoric species, mostly ones that are extinct. It focuses primarily on fossil data, using a variety of physical, chemical and biological techniques to analyse them.
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