Morphometric analysis of microfossils from stratigraphic sections can augment the resolution of existing biostratigraphic zonations.<ref name=ch17r72>Reyment, R., A., 1980, Morphometric methods in biostratigraphy: London, Academic Press, 168 p.</ref> The illustration to the right shows changes vs. age in the average morphometrically defined shape of tests in populations of the planktonic foraminifera ''Globoquadrina altispira''. | Morphometric analysis of microfossils from stratigraphic sections can augment the resolution of existing biostratigraphic zonations.<ref name=ch17r72>Reyment, R., A., 1980, Morphometric methods in biostratigraphy: London, Academic Press, 168 p.</ref> The illustration to the right shows changes vs. age in the average morphometrically defined shape of tests in populations of the planktonic foraminifera ''Globoquadrina altispira''. |