Abstract
Coccoliths are calcified scales formed around unicellular alga, Coccolithophore. They are divided into three types according to their morphology: heterococcolith, holococcolith, nanolith. Recent SEM-EBSD study indicated the variation of Cretaceous heterococcolith crystallographic properties. In this presentation, we report the crystallographic properties of Cenozoic fossil heterococcoliths and nanoliths using SEM-EBSD and SEM sterophotogrametry.