We report an extraordinary discovery of marine Pleistocene strata from the north of the Persian Gulf. The Dayyer section contains a rich molluscan fauna including 26 bivalve species, Sr⁸⁷/Sr⁸⁶ data showing that the succession is not older than 153 ka (late Pleistocene). These strata are time-equivalents of the Bakhtiari Formation, but have a very different fossil content and facies. Comparing the Dayyer molluscan community to the present-day fauna of the Persian Gulf shows that many fossil species are absent in the recent waters. The palaeoceanographic distribution of the identified bivalves shows the presence of many of them in the Plio-Pleistocene strata of the Mediterranean Basin. This may point to a temporary connection between the Persian Gulf and Mediterranean Basin during the late Pleistocene and the extinction of many bivalves in the past 153 ka

我们报告了波斯湾北部海洋更新世地层的非凡发现。Dayyer 部分包含丰富的软体动物群，包括 26 种双壳类动物，Sr ⁸⁷ /Sr ⁸⁶数据显示该演替不超过 153 ka（晚更新世）。这些地层是 Bakhtiari 组的时间等价物，但具有非常不同的化石含量和相。将 Dayyer 软体动物群落与波斯湾现今的动物群进行比较表明，在最近的水域中不存在许多化石物种。已识别的双壳贝类的古海洋学分布表明，其中许多存在于地中海盆地的上更新世地层中。这可能表明晚更新世期间波斯湾和地中海盆地之间存在临时联系，以及过去 153 ka 内许多双壳类动物的灭绝