Lochkovian | |
Color: | Lochkovian |
Time Start: | 419.2 |
Time Start Uncertainty: | 3.2 |
Time End: | 410.8 |
Time End Uncertainty: | 2.8 |
Timeline: | Devonian |
Name Formality: | Formal |
Name Accept Date: | 1985[1] |
Celestial Body: | earth |
Usage: | Global (ICS) |
Timescales Used: | ICS Time Scale |
Chrono Unit: | Age |
Strat Unit: | Stage |
Timespan Formality: | Formal |
Lower Boundary Def: | FAD of the graptolite Monograptus uniformis |
Lower Gssp Location: | Klonk, Prague, Czech Republic |
Lower Gssp Accept Date: | 1972[2] |
Upper Boundary Def: | FAD of the conodonts Eognathodus sulcatus and Latericriodus steinachensis Morph beta |
Upper Gssp Location: | Velká Chuchle quarry, Velká Chuchle, Prague, Czech Republic |
Upper Gssp Accept Date: | 1989 |
The Lochkovian is one of three faunal stages in the Early Devonian Epoch. It lasted from 419.2 ± 3.2 million years ago to 410.8 ± 2.8 million years ago. It marked the beginning of the Devonian Period, and was followed by the Pragian Stage. It is named after the village of Lochkov in the Czech Republic, now part of the city of Prague.[3] The GSSP is located within the Lochkow Formation at the Klonk Section in Prague.
In North America the Lochkovian Stage is represented by Gedinnian or Helderbergian time.