(Table 4) Radiocarbon age of carbonate nodules from the Gulf of California at Station DM9-666

New data on phosphorites collected by dredging and trawling at depths from 2700 to 520 m in the open Atlantic Ocean (i.e. outside of the shelf and the continental slope) are reported. Aphanitic, granular, brecciated, and conglomerate-like types are distinguished among the phosphorites. A comparison of the studied phosphorites with ones from the Atlantic shelf of Africa and from seamounts of other oceans is made.

本研究报道了在大西洋开阔海域（即陆架与大陆坡以外区域）水深2700米至520米处通过挖斗采样与拖网采集获得的磷灰岩（phosphorite）新数据。该批次磷灰岩可划分为隐晶质、粒状、角砾状及砾岩状四类。本研究将所获磷灰岩与非洲大西洋陆架及其他大洋海山产出的磷灰岩进行了对比分析。