[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Sloping terrain Re: Woman against Abelisaur
On 7/25/2011 7:39 PM, Tim Williams wrote:
You may well be right. But I'll counter with the relevant paragraph
from Heinrich et al. (2011):
"Several fully articulated feet of Brachiosaurus, Janenschia
and Tornieria, buried in an upright natural
position, indicate that huge sauropods also visited the
lagoon and, at least occasionally, got stuck in the
mud. Such articulated parts of skeletons are rare and
accumulations of disarticulated bones of sauropods
prevail. Interestingly, all these assemblages are dominated
by bones of adult individuals. Therefore, some
palaeontologists believe that body weight was an important
selective factor for the survival of sauropods.
Because of their lower weight, juvenile sauropods less
frequently mired than adults who often passed the
point-of-no-return due to their heavier body weight."
There are other explanations -- drought stress/predators already knocked
off the juvvies, as example...
It would be a rare and special situation wherein an elephant-sized
animal would not mire, yet a larger would mire, in my view -- but it
I note that Heinrich does advance the lighter/heavier idea as his own,
or subscribe to it, at least in that paragraph...