Talk:Variscan orogeny

message: Wonderful idea. Gee, I haven't even finished working on the article, but this instant response is great. The Encyclopedia Britannica under Europe treats Variscan and Hercynian as synonyms. To try and pin the orogeny down to a narrow range, I'm not sure that works. Geologists are always trying to define these orogenies. Would it be better to keep it general?Botteville 14:46, 9 August 2005 (UTC)
thread_title: Antics

message: The Variscan orogeny is given in the article as occuring aprox between 390Ma and 310Ma in the "early Paleozoic".
Firstly (and unimportantly), does Ma stand for "Million years ago"?
Secondly (and a bit more importantly), the dates given (between 390-310 Ma) are probably more applicable to the later Paleozoic.
Which is correct?
First: yes, Ma stands for Mega-annum (million years before present), it is as far as I know the international convention, though Mya is also used. Second: it should indeed be later paleozoic. Woodwalker 21:37, 2 August 2006 (UTC)
thread_title:  early paleozoic? 

message: The Hercynian comprises a number of orogenic cycles of which the Variscan orogeny is but one.
This includes the Acado-Ligerian, Bretonian, Variscan and Alleghenian. —The preceding unsigned comment was added by 66.28.226.91 (talk • contribs) .
As Variscan is said to be s a subset of Hercynian the redirect from Hercynian orogeny to Variscan orogeny doesn't really make sense. There should be some major reworking on this. --Jo (talk) 23:22, 26 December 2007 (UTC)
thread_title:  Topic revision 

message: There is an effort to try to get the North Sea article passed to GA status, and a request was made by the reviewer for the geological history.  An article has been roughly begun North Sea Geological History to summarize into the North Sea article.  If anyone can help it would be greatly appreciated!  SriMesh | talk 01:11, 22 November 2008 (UTC)
thread_title: Help with creation of [[North Sea Geological History]]

message: A search at Google scholar brings up many uses of the term "Hercynian orogeny" in recent publications, in spite of what the Wikipedian pundit tells us here.--Wetman (talk) 23:34, 23 July 2009 (UTC)
thread_title:  Hercynian orogeny 

message: The term Variscides crops up once: why not substitute the approrpiate expression already being employed?--Wetman (talk) 17:28, 23 January 2010 (UTC)
thread_title: "Variscides"

message: Inexpertly, the ancient terranes of Avalonia, Armorica, Cimmeria, and south & north China, may have formed a long super-terrane, stretching along, and forming, the (then-)northern coast of Gondwana.  Those terranes had been attached to Africa, Arabia, India, & Australia:
: http://s10.postimage.org/o10goj0rt/Avalonia_Armorica_Cimmeria_China_superterrane.png
Inexpertly, the uplift of the central Pangean mountains, from c.400-300Ma, can be entirely attributed to the collision of the continents, of Euramerica (northwest) and Gondwana (southeast).  Please ponder, that crustal rock commonly compresses or stretches by factors of 1.5-2.0.  Thus, the continental shelves of Euramerica & Gondwana can be "stretched out to reach each other", in the Devonian period c.375Ma.  Then what could have caused the opening of the Tethys sea, and the eventual rifting through of Pangea?  By c.300Ma, Gondwana had migrated to earth's south pole; and Australia shifted south by about 40°.  But north & south China, Cimmeria, and the rest of that long super-terrane evidently remained accreted to Euramerica.  Ergo, a rift opened up behind (to the north of) Australia, in its wake; and that rift gradually worked its way inland, peeling apart Euramerica + mountainous super-terrane (north) from Gondwana (south).  By c.200Ma, that rift reached the region of the Central Atlantic Magmatic Province, which flood basalts resulted from the rifting.
: http://s15.postimage.org/dmf59c8bf/Pangean_mountains_Tethys_rift.png
66.235.38.214 (talk) 14:32, 18 October 2012 (UTC)
thread_title:  Pangean mountains, Tethys rift ? 

message: No other Wikipedia article, describing the Pamir, Altai, or other Asian mountain ranges, indicated in the second figure, discuss any Paleozoic origin, for those orogenies.  Is that second figure accurate?? 66.235.38.214 (talk) 07:59, 19 October 2012 (UTC)
thread_title:  Asian extension of Variscan mountains ??