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Are these the precursors to the Insular Mountains or the Coast Mountains? The article should say so, or which geological belt they're now part of. Skookum1 ( talk) 18:05, 3 November 2009 (UTC)
The Insular islands migrated towards North America for about ~200Myr. At an average tectonic plate speed of ~10cm/yr (=100km/Myr), they migrated ~20,000km, or approximately 180 degrees of longitude. Now, that amazing amount of migration is actually possible. For, reconstructed maps, for earth in the Carboniferous period, show that the ancient paleo-Pacific ocean spanned ~210 degrees of longitude. Thus, the Insular islands perhaps imply the location, of the ancient paleo-east-Pacific-rise, back in the mid-Carboniferous period. If so, then the ancient paleo-Pacific Mid-Ocean-Ridege was located about ~30 degrees (several thousand km) east of the ancient North China terrain. Inexpertly, the ancient spreading ridge may even have separated North China from the Insular islands; however, against that possibility, North China was obducting oceanic crust, emerging from the west side, of the paleo-Pacific spreading ridge; and opening oceans, deriving from prior continental rifting, e.g. Atlantic ocean, do not subduct under the very land-masses previously rifted apart (the young sea floor grows onto the margins of the continents). But the Insular islands were plausibly an equatorial island-like terrain, geographically near ancient North China. That would explain the presence of fossil foraminifera in the Insular terrains, that resemble those from ancient south-east Asia (according to the Open University textbook Earth's Engine). 66.235.38.214 ( talk) 07:27, 9 October 2012 (UTC)
http://upload.wikimedia.org/wikipedia/commons/0/04/LateCarboniferousGlobal.jpg http://www.askaboutireland.ie/aai-files/assets/libraries/an-chomhairle-leabharlanna/reading-room/physical-landscape/carboniferous-glaciation.jpg
66.235.38.214 ( talk) 13:58, 9 October 2012 (UTC)
![]() | This article is rated Stub-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||||
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![]() | It is requested that a map or maps be
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improve its quality. Wikipedians in North America may be able to help! |
Are these the precursors to the Insular Mountains or the Coast Mountains? The article should say so, or which geological belt they're now part of. Skookum1 ( talk) 18:05, 3 November 2009 (UTC)
The Insular islands migrated towards North America for about ~200Myr. At an average tectonic plate speed of ~10cm/yr (=100km/Myr), they migrated ~20,000km, or approximately 180 degrees of longitude. Now, that amazing amount of migration is actually possible. For, reconstructed maps, for earth in the Carboniferous period, show that the ancient paleo-Pacific ocean spanned ~210 degrees of longitude. Thus, the Insular islands perhaps imply the location, of the ancient paleo-east-Pacific-rise, back in the mid-Carboniferous period. If so, then the ancient paleo-Pacific Mid-Ocean-Ridege was located about ~30 degrees (several thousand km) east of the ancient North China terrain. Inexpertly, the ancient spreading ridge may even have separated North China from the Insular islands; however, against that possibility, North China was obducting oceanic crust, emerging from the west side, of the paleo-Pacific spreading ridge; and opening oceans, deriving from prior continental rifting, e.g. Atlantic ocean, do not subduct under the very land-masses previously rifted apart (the young sea floor grows onto the margins of the continents). But the Insular islands were plausibly an equatorial island-like terrain, geographically near ancient North China. That would explain the presence of fossil foraminifera in the Insular terrains, that resemble those from ancient south-east Asia (according to the Open University textbook Earth's Engine). 66.235.38.214 ( talk) 07:27, 9 October 2012 (UTC)
http://upload.wikimedia.org/wikipedia/commons/0/04/LateCarboniferousGlobal.jpg http://www.askaboutireland.ie/aai-files/assets/libraries/an-chomhairle-leabharlanna/reading-room/physical-landscape/carboniferous-glaciation.jpg
66.235.38.214 ( talk) 13:58, 9 October 2012 (UTC)