The Earth has undergone multiple shifts in climate state over the past ~720 million years. The icehouse-greenhouse transition, occurring during the terminal Cryogenian, latest Ordovician, and late Paleozoic, have been accompanied by significant biological and environmental changes, predominantly recorded in sedimentary deposits. This session will feature the latest research on biosedimentary responses during these icehouse-greenhouse transitions, with a particular emphasis on biological processes influencing sedimentation and concurrent key biogeochemical cycles of elements (e.g., carbon, nitrogen, and sulfur) at regional and global scales.