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The problem of the Precambrian—Cambrian boundary

Published online by Cambridge University Press:  01 May 2009

A. Yu. Rozanov  and
B. S. Sokolov
A. Yu. Rozanov
Affiliation:
Palaeontological Institute of U.S.S.R. Academy of Sciences, Maronovsky per 26, Moscow B-49, U.S.S.R.
B. S. Sokolov
Affiliation:
Palaeontological Institute of U.S.S.R. Academy of Sciences, Maronovsky per 26, Moscow B-49, U.S.S.R.
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Extract

In the last few years the problem of the lower boundary of the Cambrian has been dealt with in dozens of works which considered not only the history of the question but all the current material available. It is a subject discussed at many national and international symposia. Although great progress has been achieved in drawing together the points of view on the position of the boundary (compare the results of the symposia held in Paris in 1958 with that in 1974), the range of different opinions still remains wide, particularly with regard to the zonal scales (for example, in Siberia, from the base of the Nemakit–Daldyn horizon up to the base of the beds with Fallotaspis). First, therefore, we give consideration to those questions which often constitute a stumbling block. It seems necessary to make a reservation that some of the difficulties arising may undoubtedly be referred to as purely psychological.

Type
Articles
Information
Geological Magazine , Volume 117 , Issue 1 , January 1980 , pp. 23 - 27
Copyright
Copyright © Cambridge University Press 1980

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References

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