Stratotype Point Base of Early Devonian
true
IUGS Series A, 5, p. 96 109, 1977
within Bed 20
Location of Stratotype Point Base of Devonian
Ratified 1972
Stratotype Point Base of Lower Devonian
Stratotype Point Base of Devonian
Klonk, near Prague, Czech Republic
Stratotype Point Base of Lochkovian
Stratotype Point Base of Lochkovian
Graptolite FAD Monograptus uniformis