Science. 1970 Nov 20;170(3960):847-8. doi: 10.1126/science.170.3960.847.
The foraminifer Hyalinea baltica is found for the first time in sediments from the western Caribbean Sea. Its relationship to the Plio-Pleistocene boundary and to other criteria used to define this boundary is examined, with the result that a strict adherence to the classical definition is urged.
有孔虫类海豆芽首次在西加勒比海的沉积物中被发现。本文研究了它与上新世-更新世界线的关系及其它定义该界线的标准，结果强调应严格遵循经典定义。
