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1980年6月,本文作者之一的K.Kelts曾去美国参加由经济古生物学者和矿物学者协会组织的地质旅行。该行主要是观察和研究怀俄明州西南始新统绿河组的沉积环境。对此次旅行中带回瑞士苏黎世联邦理工学院地质研究所的样品,曾作了切片、X-射线衍射和碳氧同位素分析。其目的在于从同位素地球化学方面研究戈秀特湖(Lake Gosiute)的特征。众所周知,对怀俄明州始新统绿河组沉积条件的研究,自Bradley(1926,1948)的
In June 1980, K. Kelts, one of the authors of this paper, traveled to the United States for geological travel organized by the Association of Economic Paleontologists and Mineralogists. The bank is primarily concerned with the observation and study of the sedimentary environment of the Eoit Green Group in the southwestern Wyoming. Samples taken back to the Institute of Geology of the Federal Institute of Technology in Zurich, Switzerland, on this trip were sliced, X-ray diffraction and carbon-oxygen isotope analysis. Its purpose is to study the characteristics of Lake Gosiute from isotopic geochemistry. It is well known that the study of depositional conditions of the Eocene Green River Formation in Wyoming, since Bradley (1926, 1948)