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据天津地区牡蛎滩的研究,本文确认:在渤海西岸牡蛎滩中,以天津宁河地区所见最为发育;它由长重蛎和近江重蛎2种的尸积群和埋葬群组成。据~(14)C测年可知,它们自中全新世初期即已形成,一直延续到2kaB.P.(~(14)C年代)余。其顶板有程度不同的起伏,即使有河口位置空间移动的影响,其顶板分布范围也仅是在现代天津地区平均低潮线下,故而,它们不能表明海平面波动,由于带状牡蛎滩近EW向分布,表明当时潮汐方向与现代相近。
According to the study of oyster beach in Tianjin area, this paper confirms that in the oyster beach on the west coast of the Bohai Sea, the Ningxia area in Tianjin is the most developed area. It consists of two types of corpses and burial groups of Oyster Oyster and Oyster Oyster. According to the ~ (14) C dating, they have been formed since the early Holocene and have lasted till 2kaB.P. (~ (14) C). The roof has different ups and downs. Even with the spatial movement of the estuary, the roof distribution range is only below the average low tide line of the modern Tianjin area. Therefore, they can not indicate sea level fluctuations. Since the belt-shaped oyster beach is near the EW direction Distribution, indicating that the tidal direction and modern similar.