Rodinia - iidne superkontinent

(27-02-2013 17:00 )Tropp Kirjutas:  
Kuhu see siis paigutub:
http://et.wikipedia.org/wiki/Pangaea
?

Tsitaat Pangaea inglise keelsest artiklist:

Tsitaat:The forming of supercontinents and their breaking up appears to have been cyclical through Earth's history. There may have been several others before Pangaea. The fourth-last supercontinent, called Columbia or Nuna, appears to have assembled in the period 2.0–1.8 Ga.[5][6] Columbia/Nuna broke up and the next supercontinent, Rodinia, formed from the accretion and assembly of its fragments. Rodinia lasted from about 1.1 billion years ago (Ga) until about 750 million years ago, but its exact configuration and geodynamic history are not nearly as well understood as those of the later supercontinents, Pannotia and Pangaea.

Rodinia lagunes laiali ning fragmentidest moodustus Pangaea. Enne Rodiniat oli veel Columbia(või Nuna) ja ilmselt midagi ka enne seda, aga mida kaugemale ajas tagasi seda raskemaks see mineviku kokkulappimine läheb.