The nanostructural and nanotextural features of the Vendian (Callus) concretionary and Alb-Cenomanian shelly, sponge phosphates of two levels of phosphate accumulation on the territory of Ukraine were investigated, using precision research methods (scanning electron microscopy, EDS analysis). The following nanotextures of phosphates were documented: globular (in cavities, hypergenic-corroded crystalomorphic), microglobular, intrinsic (globular, crystalomorphic, crustified), crystallomorphic (elongated-prismatic, shortprismatic, needle, sub-parallel, non-oriented), radial-ray. The basic genetic types of their nanotextures (biomorphic, microbial, diagenetic, hypergenic, etc.) were distinguished and described. It is shown that for Cretaceous Alb-Cenomanian phosphates globular, and for Vendian crystalomorphic heterogeneous nanotextures are characteristic.

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