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Book Chapter

The Silurian System

By
Nils Spjeldnaes
Nils Spjeldnaes
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Published:
January 01, 1978

Abstract

The newly agreed-upon Silurian-Devonian boundary is an excellent example of a modern high precision definition of a stratotype boundary, based on biostratigraphic evidence. The Ordo- vician-Silurian boundary is being studied by a working group under two subcommittees (Ordovician and Silurian). The biostratigraphic factual material forms an excellent base for relative-time stratigraphy in the Silurian (both for the boundaries to other systems, and internally). Stratigraph- ically relevant isotope datings are few. Although many datings have been published covering the general time interval of the Silurian, only a few have been adequately tied to the fossiliferous sequence, and there is not much good evidence for the precise absolute dates of either the upper or the lower boundary. The result is that estimates of the duration of the Silurian varies with as much as 100%. The available evidence is critically examined and a dating program suggested.

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Contents

AAPG Studies in Geology

Contributions to the Geologic Time Scale

George V. Cohee
George V. Cohee
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Martin F. Glaessner
Martin F. Glaessner
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Hollis D. Hedberg
Hollis D. Hedberg
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American Association of Petroleum Geologists
Volume
6
ISBN electronic:
9781629812007
Publication date:
January 01, 1978

GeoRef

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