Abstract—The paper describes the composition of bottom and beach sediments of the large accumulation form (the Anapa bay-bar). It has been shown that the sand particles size increases in the direction from the edges of the bar to its center and from a depth of 7 m to the beach. When comparing the data of 2012‒2018, it can be seen that, on the whole, the size and composition of the sand have not changed significantly. The mean share of carbonates in bottom sediments was 11%. Analysis of two mass mollusk species biomass dynamics in 2016– 2018 shows that the increase in carbonates content is not directly related to the increase in the living mollusks biomass. Average annual production of bivalves’ shells is more than 4000 t.

中文翻译：

---

阿纳帕湾-巴尔沉积物的分布和组成

摘要—本文描述了大型堆积形式（阿纳帕湾-巴尔）底部和海滩沉积物的组成。已经表明，砂粒的尺寸在从棒的边缘到其中心以及从深度7m到海滩的方向上增加。比较2012-2018年的数据，可以看出，总体而言，沙粒的大小和组成没有明显变化。底部沉积物中碳酸盐的平均份额为11％。对2016-2018年两种软体动物物种生物量动态的分析表明，碳酸盐含量的增加与生活软体动物生物量的增加没有直接关系。双壳贝壳的平均年产量超过4000吨。