Stable isotopes on fossile Macoma calcarea, Laptev Sea

Distance is samping profile along the shell valve from umbo to ventral margin, shell collected in 210 cm core depth, age determined by 14C AMS is 3.81 kyr所测距离为贝壳瓣（shell valve）自壳顶（umbo）至腹缘（ventral margin）的采样剖面长度；样品采集于210厘米深度的岩芯中，经14C AMS（加速器质谱碳十四测年）测定其年代为3.81千年（kyr）。