Re: Prior to Gondwana?

[Ray McAllister <mcallist@gate.net>]

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