Secondary Calcification in the Foraminiferal Genus Globorotalia
Secondary Calcification in the Foraminiferal Genus Globorotalia
复制标题
Globorotalia 有孔虫属的二次钙化
作者：
W. N. Orr
来自墨西哥湾沉积物的四种浮游有孔虫属 Globorotalia 种群显示了测试二次增厚的影响。薄壁和厚壁样本分布的定量表格说明了每个物种发生增厚的突然且独立的深度。
Populations of four species of the planktonic foraminiferal genus Globorotalia from sediments in the Gulf of Mexico show the effects of secondary thickening of the test. Quantitative tabulation of the distribution of thin- and thick-walled specimens illustrates an abrupt and separate depth at which the thickening takes place for each species.