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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
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Many age determinations on sedimentary Precambrian sequences have been published. These measurements were made on whole-rock samples, clay fractions, or interbedded volcanics. A new approach leads to new possibilities about numerical stratigraphy of old nonfossiliferous sediments. This paper is a first attempt to build a nearly worldwide correlation of middle and upper Precambrian sediments based on age determinations.
The main problem with these results is in their interpretation. The age may be the age of the source area of the sediment, the time of deposition or early diagenesis, the time of epimetamorphism, or the time of late diagenesis. Some criteria useful in the interpretation of age determinations in sediments are defined.
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