Abstract

Marine Oil Snow Sedimentation and Flocculent Accumulation (MOSSFA) refers to the process of formation, sinking, and seafloor deposition of oil-contaminated marine snow and oil-mineral aggregates. MOSSFA was well documented in the northern Gulf of Mexico (GoM) in the aftermath of the Deepwater Horizon (DWH 2010) and likely occurred in the southern GoM during Ixtoc 1 (1979–1980). This chapter introduces Part IV: Oil Spill Records in Deep Sea Sediments and addresses a series of questions regarding MOSSFA in the sedimentary record: What were the characteristics of MOSSFA sedimentary inputs? What was the extent of MOSSFA on the seafloor? What postdepositional processes took place as a result of MOSSFA? Can MOSSFA be preserved in the sedimentary record?

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