Science. 1971 Sep 17;173(4002):1122-4. doi: 10.1126/science.173.4002.1122.
Oxygen isotopic analysis of different size groups of shells of pelagic foraminiferal species shows that some species deposit their shells at constant depths while others deposit them at increasing or decreasing depths. These patterns show regional variations. Globigerinoides rubra and Globigerinoides sacculifera remain the most convenient species for oxygen isotopic determination of the past surface temperatures of the ocean.
对浮游有孔虫不同大小群体贝壳的氧同位素分析表明，有些物种在恒定深度沉积贝壳，而有些则在增加或减少的深度沉积贝壳。这些模式显示出区域差异。红色有孔虫和球石有孔虫仍然是最方便的用于确定海洋过去表面温度的氧同位素物种。
