"The aims of this thesis, essentially based on the Upper Triassic atoll‐type carbonates of the Sambosan accretionary complex, Japan, (deposited upon seamounts in a mid‐oceanic setting of the Panthalassa) are: (1) to characterize the sedimentary facies together with the depositional setting of these limestones, (2) to provide additional micropaleontological data; (3) to decipher the evolutionary trends and the paleobiogeographic distribution of the Japanese benthic organisms (e.g., foraminifers) between Tethys and Panthalassa; (4) as well as to heighten the paleoposition of the Sambosan seamount province during the Triassic time (Hemisphere origin?)"--Abstract.
"This thesis contributes to the resolution of one of the most controversial open questions about Sicilian geology: the age of the Lercara Formation. During the last century, it was variously attributed to the Permian, the Triassic, the Paleogene or the Miocene. A part from the question of the age, this work analyses the palaeoenvironmental context associated to the Lercara Formation deposition and the palaeogeographical evolution of the occidental part of the Tethys during the Permian and the Triassic. The study integrates sedimentological, biostratigraphic and mineralogical analyses, and proposes the reconstitution of the Sicanian basin subsidence history"--Abstract.