Famennian
Period
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The Famennian is the later of two faunal stages in the Late Devonian epoch. The most recent estimate for its duration is that it lasted from around 371.1 to 359.3 million years ago. Wikipedia
Occurred: 372.2 (+/- 1.6) million years ago - 358.9 (+/- 0.4) million years ago
Epoch: Upper Devonian
Lower boundary definition: FAD of the conodont Palmatolepis subperlobata; LAD of the conodont Palmatolepis bogartensis
Lower boundary GSSP: Coumiac quarry, Montagne Noire, France; 43°27′41″N 3°02′25″E / 43.4613°N 3.0403°E
Lower GSSP ratified: 1993
Upper boundary definition: FAD of the conodont Siphonodella sulcata (discovered to have biostratigraphic issues as of 2006).
Upper boundary GSSP: La Serre, Montagne Noire, France; 43°33′20″N 3°21′26″E / 43.5555°N 3.3573°E