(Table 1) Pollen assemblage at DSDP Holes 96-603B and 93-605

The analysis of 104 core-catcher samples from Site 603 resulted in a continuous palynological record from the middle Miocene to early Pleistocene. Two palynological zones could be established (Zone 2, below 380 m: high Pinus, Quercus, and Carya values; Zone 1, above 380 m: high Pinus, and Sphagnum values). The marine pollen record was found to reflect the history of the vegetation of the eastern United States, the flora from Zone 2 indicating a warmer climate than that from Zone 1, which depicts a climatic cooling trend. The onset of Western Boundary Undercurrent deposition had no noticeable effect on the pollen distribution in the marine sediments.

对603站位的104份岩芯捕获器（core-catcher）样品开展分析，获得了从中中新世至更新世早期的连续孢粉记录。本研究可划分出两个孢粉带：2号带（深度380米以下）以松属（Pinus）、栎属（Quercus）及山核桃属（Carya）含量偏高为特征；1号带（深度380米以上）则以松属及泥炭藓属（Sphagnum）含量偏高为特征。该海洋花粉记录能够反映美国东部的植被演化历史，其中2号带对应的植物群所指示的气候较1号带更为温暖，而1号带则体现出气候变冷的趋势。西边界底流（Western Boundary Undercurrent）沉积的起始过程，并未对海洋沉积物中的花粉分布产生显著影响。