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Quarry 10



Ahoy!
Friend at work just gave me May 2008 _Smithsonian_, with a short article on 
Cope-Marsh and Arthur Lakes Morrison Quarry 10. 
Mention is made of baby _Apatosaurus_ tracks, spaced far apart, of the rear 
legs only - "scoot(ing) along on its hind legs like a basilisk,". Could these 
be underprints and the lighter tread fore prints eroded away or was this 
juvenile really "booking"? Would this make the adult tripodal stance more 
likely?
-mpc