Lochkovian
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 a part of the city of Prague.[2]
| System/ Period |
Series/ Epoch |
Stage/ Age |
Age (Ma) | ||
|---|---|---|---|---|---|
| Carboniferous | Mississippian | Tournaisian | younger | ||
| Devonian | Upper/ Late |
Famennian | 358.9 | 372.2 | |
| Frasnian | 372.2 | 382.7 | |||
| Middle | Givetian | 382.7 | 387.7 | ||
| Eifelian | 387.7 | 393.3 | |||
| Lower/ Early |
Emsian | 393.3 | 407.6 | ||
| Pragian | 407.6 | 410.8 | |||
| Lochkovian | 410.8 | 419.2 | |||
| Silurian | Pridoli | no faunal stages defined | older | ||
| Subdivision of the Devonian system according to the ICS, as of 2017.[1] | |||||
In North America the Lochkovian Stage is represented by Gedinnian or Helderbergian time.
Lochkovian life
Agnathans
| Agnathans of the Lochkovian | ||||
|---|---|---|---|---|
| Taxa | Presence | Location | Description | Images |
| Drepanaspis | Lochkovian-Emsian | Hunsrück Slate, Germany, among others in Europe | ||
| Errivaspis | Lochkovian-Emsian | Wayne Hereford Quarry, England & Babin Sandstone, Podolia, Ukraine | ||
| Pteraspis | Lochkovian-Emsian | Britain & Belgium | ||
gollark: This is very bad at sustained writes, but 25% cheaper to make.
gollark: Of course, a thing to fear is that most modern consumery disks (including that Barracuda, and WD Blues) use shingled magnetic recording.
gollark: Western Digital. They make HDDs.
gollark: Have you seen entry #2 of the CG7 competition?
gollark: Just make Codex do it.
References
- http://www.stratigraphy.org/index.php/ics-chart-timescale
- "Lochkovian Stage". Encyclopedia Britannica. Retrieved 2 October 2019.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.