Devonian
| Devonian | |
|---|---|
 Late Devonian world map | |
| Chronology | |
| Etymology | |
| Name formality | Formal |
| Nickname(s) | Age of Fishes |
| Usage information | |
| Celestial body | Earth |
| Regional usage | Global (ICS) |
| Time scale(s) used | ICS Time Scale |
| Definition | |
| Chronological unit | Period |
| Stratigraphic unit | System |
| Time span formality | Formal |
| Lower boundary definition | FAD of the Graptolite Monograptus uniformis |
| Lower boundary GSSP | Klonk, Czech Republic 49°51′18″N 13°47′31″E / 49.8550°N 13.7920°E |
| GSSP ratified | 1972[1] |
| Upper boundary definition | FAD of the Conodont Siphonodella sulcata (discovered to have biostratigraphic issues as of 2006).[2] |
| Upper boundary GSSP | La Serre, Montagne Noire, France 43°33′20″N 3°21′26″E / 43.5555°N 3.3573°E |
| GSSP ratified | 1990[3] |
| Atmospheric and climatic data | |
| Sea level above present day | Relatively steady around 189 m, gradually falling to 120 m through period[4] |
Devonian යනු වසර මිලියන 419-359 කට පෙර, එනම් Paleozoic යුගයේ සිව්වන කාලපරිච්ඡේදය වේ.
ආශ්රිත
[සංස්කරණය]- Falls of the Ohio State Park. One of the largest exposed Devonian fossil beds in the world.
- Geologic time scale
- List of Early Devonian land plants
- List of fossil sites (with link directory)
- Phacops rana, a Devonian trilobite
- ප්රවර්ග
- [[::Category:Devonian plants|:Category:Devonian plants]]
සටහන්
[සංස්කරණය]මූලාශ්ර
[සංස්කරණය]- ^ Chlupáč, Ivo; Hladil, Jindrich (January 2000). "The global stratotype section and point of the Silurian-Devonian boundary". CFS Courier Forschungsinstitut Senckenberg: 1–8. සම්ප්රවේශය 7 December 2020.
- ^ Kaiser, Sandra (1 April 2009). "The Devonian/Carboniferous boundary stratotype section (La Serre, France) revisited". Newsletters on Stratigraphy. 43 (2): 195–205. doi:10.1127/0078-0421/2009/0043-0195. සම්ප්රවේශය 7 December 2020.
- ^ Paproth, Eva; Feist, Raimund; Flajs, Gerd (December 1991). "Decision on the Devonian-Carboniferous boundary stratotype" (PDF). Episodes. 14 (4): 331–336. doi:10.18814/epiiugs/1991/v14i4/004.
- ^ Haq, B. U.; Schutter, SR (2008). "A Chronology of Paleozoic Sea-Level Changes". Science. 322 (5898): 64–68. Bibcode:2008Sci...322...64H. doi:10.1126/science.1161648. PMID 18832639. S2CID 206514545.
භාහිර සබැඳි
[සංස්කරණය]
Wikisource has original works on the topic: Paleozoic#Devonian
Devonian හා සබැඳි මාධ්ය විකිමාධ්ය කොමන්ස් හි ඇත.
- "Devonian". Devonian Times. 2010-02-11 දින මුල් පිටපත වෙතින් සංරක්ෂණය කරන ලදී.
- "Devonian life". UC Berkeley. – site introduces the Devonian
- "Geologic Time Scale". International Commission on Stratigraphy (ICS). 2004. සම්ප්රවේශය 19 සැප්තැම්බර් 2005.
- "Examples of Devonian Fossils".
- "Devonian chronostratigraphy scale".
- "Devonian". Palaeos. 28 ඔක්තෝබර් 2007 දින මුල් පිටපත වෙතින් සංරක්ෂණය කරන ලදී.
- "Museum". Age of Fishes.
