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Devonian - Devonian palaeogeography

Devonian - Devonian palaeogeography: Encyclopedia II - Devonian - Devonian palaeogeography

The Devonian period was a time of great tectonic activity, as Laurasia and Gondwanaland drew closer together. The continent Euramerica (or Laurussia) was created in the early Devonian by the collision of Laurentia and Baltica, which rotated into the natural dry zone along the Tropic of Cancer, which is formed as much in Paleozoic times as nowadays by the convergence of two great airmasses, the Hadley cell and the Ferrel cell. In these near-deserts, the Old Red Sandstone sedimentary beds formed, made red by the oxidized ...

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 - Devonian palaeogeography



Devonian - Devonian palaeogeography

The Devonian period was a time of great tectonic activity, as Laurasia and Gondwanaland drew closer together. The continent Euramerica (or Laurussia) was created in the early Devonian by the collision of Laurentia and Baltica, which rotated into the natural dry zone along the Tropic of Cancer, which is formed as much in Paleozoic times as nowadays by the convergence of two great airmasses, the Hadley cell and the Ferrel cell. In these near-deserts, the Old Red Sandstone sedimentary beds formed, made red by the oxidized iron (hematite) characteristic of drought conditions.

Near the equator, Pangaea began to consolidate from the plates containing North America and Europe, further raising the northern Appalachian Mountains and forming the Caledonides in Britain and Scandinavia. The west coast of Devonian North America, by contrast, was a passive margin with deep silty embayments, river deltas and estuaries, in today's Idaho and Nevada; an approaching volcanic island arc reached the steep slope of the continental shelf in late Devonian times and began to uplift deep water deposits, a collision that was the prelude to the mountain-building episode of Mississippian times called the Antler orogeny [1].

The southern continents remained tied together in the supercontinent of Gondwana. The remainder of modern Eurasia lay in the Northern Hemisphere. Sea levels were high worldwide, and much of the land lay submerged under shallow seas, where tropical reef organisms lived. The deep, enormous Panthalassa (the "universal ocean") covered the rest of the planet.

Other related archives

Antler 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 "Devonian palaeogeography", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki

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