Re: Prior to Gondwana?

[ornstn@hookup.net (Ronald Orenstein)]

>Skip,
>There have been at least two prior continental clusters befor Pangaea 
>which broke up about 180 Mya. I do not have specifics but believe one 
>left a geosuture (the Ural Mts) when they came together. I think the time 
>was 500Mya but someone will correct this. Clearly the farther back we go 
>the harder it is to get a clear picture. I do believe that a visit to a 
>good university library and search of ge abstracts would give you better 
>info. Good luck. Please post a summary of what you learn.
>
>Ray McAllister, Prof (Emeritus) Ocean Eng., FAU, Boca Raton, FL 33064
>Diving Dinosaur, Geologist/Oceanographer/Ocean Engineer, 43 years SCUBA
>mcallist@gate.net (305) 426-0808, Author Diving Locations, Boynton/Dania
>

For a popular look at one aspect of pre-Gondwana movements, readers might
try "Australia: The Four-billion-year Journey of a Continent" by Reg and
Maggie Morrison, which points out among other things that during the last
three billion years Australia has visited both poles twice!
--
Ronald I. Orenstein                           Phone: (905) 820-7886 (home)
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