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Devonian - Naming | | Devonian - Naming: Encyclopedia II - Devonian - Naming | | The period is named after Devon, England where Devonian outcrops are common. While the rock beds that define the start and end of the period are well identified, the exact dates are uncertain. According to the International Commission on Stratigraphy (Ogg, 2004), the Devonian extends from the end of the Silurian Period 416.0 ± 2.8 million years ago (Mya), to the beginning of the Carboniferous Period 359.2 ± 2.5 Mya (in North America, the beginning of the Mississippian subperio ...
See also:Devonian, Devonian - Naming, Devonian - Devonian subdivisions, Devonian - Upper most recent, Devonian - Middle, Devonian - Lower oldest, Devonian - Devonian palaeogeography, Devonian - Devonian fauna, Devonian - Marine biota, Devonian - Reefs, Devonian - Terrestrial biota | | | Devonian, Devonian - Devonian fauna, Devonian - Devonian palaeogeography, Devonian - Devonian subdivisions, Devonian - Lower oldest, Devonian - Marine biota, Devonian - Middle, Devonian - Naming, Devonian - Reefs, Devonian - Terrestrial biota, Devonian - Upper most recent, Geologic timescale, Phacops rana: a Devonian trilobite. | | |
| | | Devonian: Encyclopedia II - Devonian - Naming
Devonian - Naming
The period is named after Devon, England where Devonian outcrops are common. While the rock beds that define the start and end of the period are well identified, the exact dates are uncertain. According to the International Commission on Stratigraphy (Ogg, 2004), the Devonian extends from the end of the Silurian Period 416.0 ± 2.8 million years ago (Mya), to the beginning of the Carboniferous Period 359.2 ± 2.5 Mya (in North America, the beginning of the Mississippian subperiod of the Carboniferous) (ICS 2004).
The Devonian is also known as the Age of Fishes, but the term is out of favor. While fish underwent a major radiation it was only one of several major evolutionary landmarks during the period, and other lifeforms were more common.
The Devonian has also erroneously been characterized as a Greenhouse Age, due to sampling bias: most of the early Devonian-age discoveries came from the strata of western Europe and eastern North America, which at the time straddled the Equator as part of the supercontinent of Euramerica where fossil signatures of widespread reefs indicate tropical climates that warm and moderately humid.
Even more rarely the Devonian is also known as the Old Red Age, after the red and brown terrestrial deposits known in Britain as the "Old Red Sandstone" in which these early discoveries were found.
Other related archivesAntler orogeny, Appalachian Mountains, Archaeopteris, Australia, Baltica, Britain, Carboniferous, Cladoselache, Devon, England, Equator, Euramerica, Europe, Famennian/Chautauquan/Canadaway/Conneaut/Conneautan/Conewango/Conewangan, Ferrel cell, Frasnian/Senecan/Sonyea/Sonyean/West Falls, Geologic timescale, Givetian/Erian/Senecan/Tioughniogan/Tioughnioga/Taghanic/Taghanican/Genesee/Geneseean, Gondwana, Gondwanaland, Hadley cell, International Commission on Stratigraphy, Late Devonian extinction, Laurasia, Laurentia, Mississippian, North America, Old Red Sandstone, Paleozoic, Pangaea, Panthalassa, Phacops rana, Scandinavia, Siberia, Silurian, Tropic of Cancer, algae, ammonite, amphibians, arthropods, atmospheric, bacterial, bony fish, brachiopods, bryozoa, carbon dioxide, carbonate, climates, continent, continents, coral reefs, corals, crinoids, equator, evolutionary, evolved, extinction event, faunal stages, ferns, fish, fishes, forests, fossil, geologic period, greenhouse gas, habitats, hematite, insects, island arc, legs, lobe-finned, lobe-finned fish, lycophytes, million years ago, mites, mollusks, myriapods, oceans, ostracoderms, paleogeography, placoderms, planet, plants, plates, ray-finned fish, reef, rock beds, rugose corals, sampling bias, scorpions, seed-bearing plants, sharks, sink, soils, spiders, strata, supercontinent, tectonic, tetrapods, trilobites, vertebrates, walk on land, western Europe, wood
 Adapted from the Wikipedia article "Naming", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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