What in this picture piqued David's attention? His possible coprolite is the larger, tear-shaped object in the lower lefthand corner.
I suspect it is a world class shark coprolite or a very unusual burrow - my irascible colleague feels it is only an unusual rock. We've got a wager on it - if it turns out to be a coprolite, he's offered to eat it, and I've matched him by saying I will if it turns out to be nothing. We won't be able to settle this dispute in the field - we'll have to wait until we get back to Houston. Stay tuned to see what happens. We should know in about a week.
(David also explains the process of plaster jacketing - which the team is working on today - here. We'll have photos and videos of the process posted later today.)