Natural oxides, elements and remanent magnetization intensities and directions at DSDP Hole 93-603B

Dark green spherules occur in the lower part of a turbidite in Section 603B-22-3, at the 70 cm level. In all probability these spherules originally consisted of massive glass, but now appear to have become completely altered into smectite. The presence of numerous microscopic fissures in the spherules probably mediated in the alteration process.
Judging by the presence of similar spherules at the Cretaceous/Tertiary (K/T) boundary in DSDP Hole 390B, the green spherules are thought to represent diagenetically altered impact ejecta from one large or several smaller extraterrestrial objects at the end of the Cretaceous. The presence of anomalously high concentrations of Ni, Co, and As higher up in the turbidite are in agreement with an expected enrichment of these elements in the K/T boundary clay. However, precise Ir analyses are necessary in order to confirm this.

在603B-22-3剖面70 cm深度处的浊积岩下部，产出深绿色球粒。此类球粒最初大概率由块状玻璃构成，但目前已完全蚀变为蒙脱石（smectite）。球粒内部发育的大量微观裂隙，可能在蚀变过程中起到了介导作用。
结合深海钻探计划（Deep Sea Drilling Project, DSDP）390B孔白垩纪/古近纪（K/T）界线处产出的同类球粒，这些绿色球粒被认为是白垩纪末期一次大型或多次小型地外天体撞击形成的溅射物，经成岩蚀变后的产物。浊积岩上部的镍（Ni）、钴（Co）与砷（As）出现异常高浓度，这与K/T界线黏土中这些元素的预期富集特征相符。不过，仍需开展精准的铱（Ir）分析以验证该推论。