美国怀俄明州Polecat海岸对古新世-始新世PETM事件的冲积响应

位于怀俄明州比格霍恩盆地北部的古新世-始新世PETM地层显示了与高分辨率气候记录相关的冲积记录的变化。通过研究该地层来展示古土壤变化的复杂性和地层间距。与古气溶胶重建的气候记录比较表明，这些变化与古新世-始新世PETM最大气候波动相对应。特别是，该部分的中间部分包含厚的古土壤和薄的撕裂沉积物，这些沉积物与洪泛平原的时间和较低的平均年降水量相关联。

The Paleocene-Eocene Thermal Maximum (PETM) strata in the northern Bighorn Basin, Wyoming, exhibit changes in alluvial records correlated with high-resolution climate archives. We investigate these strata to demonstrate the complexity of paleosol changes and stratigraphic spacing. Comparisons with climate records reconstructed from paleo-aerosols reveal that these changes correspond to the maximum climatic fluctuations of the Paleocene-Eocene PETM. Specifically, the middle section of this stratigraphic interval contains thick paleosols and thin rip-up sediments, which are associated with floodplain timing and lower mean annual precipitation.