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序言在过去的二十年里,北美西部已经获得了许多关于前寒武纪Z(8—5.7亿年)和前寒武纪Y(16—8亿年)的地层学和地质年代学方面的新资料。然而,尽管在少数地区已进行过对比,但在区域规模上,严谨的对比资料是不充足的。本文想根据1969年弗林特(F(?)int)等人提出的关于杂砾岩(diami(?)tites)形成的可能共时性,和1964年哈兰(Harland)提出的关于晚前寒武纪冰川作用下产生的属于冰碛岩石的上述概念,阐述从阿拉斯加州东部到加利福尼亚州东南部和亚利桑那州即北美科迪勒拉山区未变质的前寒武系地层的主要层序对比的大致输廓。
INTRODUCTION In the past two decades, many western North America have obtained stratigraphy and geochronology about the Precambrian Z (857 million years) and the Precambrian Y (1.6-8 billion years) New information However, despite comparative comparisons in a few regions, rigorous comparative data are not sufficient on a regional scale. Based on the possible synchronicity proposed by Flint (1969) (F (?) Int) et al. For the formation of diami (?) Tites, and in the opinion of Harland, The above concepts of glacial moraine produced by the Cambrian glaciers illustrate the major sequence comparison of the unquenched Precambrian strata from eastern Alaska to southeastern California and Arizona Cordillera in North America General outline.