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人们普遍认为晚期前寒武纪冰川作用分布较广。但是对它们为什么能够扩展到低纬度却很少有资料谈到。如果这～点能得到证明,那么就可以把晚期前寒武纪的冰碛岩当成地层标志层。 近年来,地质年代学的研究对许多冰碛岩的形成年龄给出了某些绝对的控制。根据邓恩等的资料,澳大利亚的埃根-莫里诺冰川作用是670百万年,而木恩莱特谷地-斯特尔提恩冰川作用是750百万年。苏联文德的时间跨度为675—560百万年,而普林格尔推断挪
It is generally accepted that the role of late Precambrian glaciers is widely distributed. However, there is very little information on why they can be extended to low latitudes. If this point can be proved, then the late Precambrian moraine can be used as a stratum marker layer. In recent years, the study of geochronology has given some absolute control over the age of formation of many moraine rocks. According to Dunn and others, the role of the Egon-Morino Glacier in Australia is 670 million years, while the effect of the Strathspey Glacier in the Kumleit Valley is 750 million years. The time span of the Soviet Union Wende was 675-560 million years, while Pringleger inferred