Over near where I found that femur, there was a part of the ash that had some weird patterns to it. In this picture, you may be able to easily see the vertical lines. Those are normal ripples. That one isn't too weird. But if you look closer, you'll see the odd pattern I'm talking about. My first (but not serious) thought was "huh. That would look a lot like dinosaur skin if this were the Mesozoic. Weird." When I showed it to Rick, he basically voiced my thoughts. Both of us were joking, but that is the texture it looks like.
So when Mike got back today, I showed it to him to see what he thought...
He said it looks like little tiny ripples superimposed on larger ones. It doesn't look like ripples caused by wind, like the rest of them though. In fact, these would be too little to be recorded if they were in sandstone. But this isn't sandstone. It is ash.
Turns out that such small ripples can be made by a small, local disturbance, say an animal dropping something or taking a step nearby. I commented at this point that I really hoped I didn't miss something significant (like a footprint) while digging. Mike took one look at the tiny ripples and said that I'd been able to spot that, anything else would've been seen, too.
Yay, vote of confidence!
Anyway, it was interesting to me that the bone was nearby these and not near a skeleton. I can just see it getting dropped and the scavenger running off once it had been stripped clean of meat. Yum.
No comments:
Post a Comment