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Changes in the environment occurring around the Cenomanian-Turonian boundary are associated with Oceanic Anoxic Event 2 (OAE2), a hyperthermal event that occurred approximately 94 Mya. Cretaceous volcanism caused CO2 levels to surge, impacting ocean chemistry, weathering rates, and the health of the marine biosphere. The Holland Park core from Virginia contains a marine record of the Atlantic Coastal Plain (ACP) over the Cenomanian and Turonian. Preliminary work suggests that the ACP did not reach full anoxia during OAE2. Therefore, the ACP may have had the potential to preserve magnetofossils, the magnetic remains of iron biomineralizing organisms that are sensitive to oxygen levels in aquatic environments. Magnetofossils and other magnetic minerals can inform us about ocean chemistry, the iron cycle, weathering, and sediment input. We measured first-order reversal curve (FORC …