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1978
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 Ordovician-Silurian boundary is being studied by a working group under two subcommittees (Ordovician and Silurian). The biostratigraphic factual material forms an excellent base
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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 Ordovician-Silurian boundary is being studied by a working group under two subcommittees (Ordovician and Silurian). The biostratigraphic factual material forms an excellent base
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