(Table S1) Benthic foraminifera at Ancora, Millville and Bass River drill sites

We describe seven Paleocene to lowermost Eocene sequences in core holes at Island Beach, Bass River, Ancora, Millville, and Sea Girt, NJ (Ocean Drilling Program Leg 150X, 174AX) and analyze benthic foraminiferal assemblages to assess paleodepth changes within sequences. These sequences are referred to as Pa0, Pa1a, Pa1b, Pa2a, Pa2b, Pa3a, and Pa3b. Paleocene sequence boundaries are identified by unconformities and variations in benthic foraminiferal biofacies. We used Q-mode factor analysis and paleoslope modeling to identify three distinct middle-outer neritic benthic foraminiferal assemblages and their associated water depths. Paleodepths during the early Paleocene and deposition of Pa0, Pa1a, and Pa2b were ~80 m with ~20 m changes across sequence boundaries. A long-term shallowing occurred through the late Paleocene where paleodepths were ~50-70 m in Pa3a. This trend drastically changes in the earliest Eocene where the paleodepths of sequence Pa3b were ~120-150 m. New Jersey Paleocene sequence boundaries correlate with those in other regions and with d18O increases in the deep sea, suggesting Paleocene eustatic lowerings were associated with ice-growth events.

本研究针对美国新泽西州Island Beach、Bass River、Ancora、Millville及Sea Girt地区的取心井，该批取心井隶属于大洋钻探计划（Ocean Drilling Program，ODP）Leg 150X、174AX航次，共描述了7套古新世至始新世最早期的地层序列，并通过分析底栖有孔虫组合（benthic foraminiferal assemblages）以评估各序列内部的古水深变化。本次研究涉及的地层序列依次编号为Pa0、Pa1a、Pa1b、Pa2a、Pa2b、Pa3a及Pa3b。古新世地层界面可通过不整合面（unconformities）以及底栖有孔虫生物相（biofacies）的变化加以识别。本研究采用Q型因子分析（Q-mode factor analysis）与古斜坡模拟（paleoslope modeling）方法，识别出3种特征鲜明的中-外浅海底栖有孔虫组合，并确定了其对应的水体深度。古新世早期以及Pa0、Pa1a、Pa2b沉积时期的古水深约为80米，各序列界面处的古水深变化幅度约为20米。古新世晚期整体呈现持续变浅的趋势，Pa3a沉积时期的古水深约为50~70米。这一趋势在始新世最早期发生显著反转，Pa3b序列沉积时期的古水深增至约120~150米。新泽西州的古新世地层界面与全球其他区域的对应界面以及深海δ¹⁸O升高事件具有相关性，表明古新世全球海平面下降与冰期增长事件存在关联。