[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: "bone spike"
Nick Longrich wrote:
> The other bit is on the bone spike. Consider that the
> preservation rate for dinosaurs of various times and places varies
> enormously between "very, very low" and "almost nothing".
> if your preservation rate is almost zero, 20 x ~0 = ~0. I guess what
> I'm asking is, should we really expect a bone spike?
You are right on here - there is little reason to expect a bone spike.
And not just for the above reason, but also due to the slow rate of
net sedimentation and the extremely sporadic nature of riparian
sedimentation, a single "level" in a formation like the Lance or Hell
Creek Formation may well represent several centuries, and thus *already*
contain the equivalent of the fossils from 100% mortality. Shortening
the mortality time below the resolution of the beds will make no
The peace of God be with you.