Where is the Global Stratotype Section and Point for the Silurian-Devonian boundary?

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Devonian paleogeography — Devonian Period Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the early Devonian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.

The Global Stratotype Section and Point (GSSP) for the Silurian-Devonian boundary is located at a cliff section near Klonk, near Suchomasty, in the Czech Republic.123

Formally ratified in 1972, this site serves as the standard reference for the base of the Devonian Period and the Lochkovian Stage. The boundary is defined by the first occurrence of the graptolite Monograptus uniformis within the rock strata. This location was the first to implement the concept of a "golden spike" internationally, providing a definitive marker to resolve historical difficulties and miscorrelations regarding the transition between the Silurian and Devonian systems.231