Rodinia: Perbedaan revisi

23 bita ditambahkan ,  11 tahun yang lalu
 
==Paleogeografi==
{{terjemah|Inggris}}
Rodinia's landmass was probably centered southselatan of the [[ekuator]].<ref>{{cite web | url = http://www.palaeos.com/Earth/Geography/Rodinia.htm | title = Rodinia | publisher = Palaeos | accessdate = 2006-03-10}}</ref> Because Earth was at that time experiencing the [[Cryogenian]] period of [[glaciation]], and temperatures were at least as cool as today, substantial areas of Rodinia may have been covered by [[glacier]]s or the southern [[polar ice cap]]. The interior of the continent, being so distant from the temperature-moderating effects of the ocean, was probably seasonally extremely cold (see [[continental climate]]). It was surrounded by the [[superocean]] geologists are calling [[Mirovia]] (from ''mir'', the Russian word for "globe").
 
Cold temperatures may have been exaggerated during the early stages of continental rifting. [[Geothermal heating]] peaks in crust about to be rifted; and since warmer rocks are less [[Density|dense]], the crustal rocks rise up relative to their surroundings. This rising creates areas of higher altitude, where the air is cooler and ice is less likely to melt with changes in season, and it may explain the evidence of abundant glaciation in the [[Ediacaran]] period.<ref name="mcmenamin">{{cite book | last = McMenamin | first = Mark A. | coauthors = Dianna L. McMenamin | title = The Emergence of Animals | origdate = 1990-01-15 | id = ISBN 0-231-06647-3 | chapter = The Rifting of Rodina}}</ref>
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