Paleoenvironmental Study of the Late Cretaceous–Eocene Tethyan Sea Associated with Phosphorite Deposits in Jordan

Petrological, geochemical, and biostratigraphical investigations have been conducted on seventy-nine samples from four selected sections in Jordan to understand the factors that influenced enrichment deposition of massive phosphorite deposits. The calcareous nannofossil marker species Broisonia parca constrica Reticulofenestra bisecta, assigned 1 2 (Hawar Al Dhahikiyya), were indicative Campanian Eocene periods, respectively. some ecological such as Kamptnerius magnificus indicates there cold periods during phosphate precipitation. All thin are grainstone packstone textures composed skeletal fragments peloids. Skeletal appeared be main component Hawar phosphates with existence peloids, while peloids 3 (section 3: Hisa). At least three intervals high phosphorous values section, showing variations Ca Nd isotopes terrigenous inputs. Four observed Sections 3. These deep water circulation early late period, interrupted by two submarine continental weathering. Deep was initiated cooling period indicated isotope components a decline indicators (Al, Si, Ti, Fe). Submarine weathering warmer deep-sea is rising ratio when many igneous provinces subjected Continental took place hydrologic cycle enhancement Fe) being observed. effect at its highest south Eocene, both represented shallower settings.