How common is it to find fossils (coprolite, toe-pad molds, seeds, etc.) on or near the surface... in near pristine condition? Wouldn't that indicate the surface ground is ancient?
Oddly, most of the petrified wood in the area IS worn, as one might expect.
P.S. I'm beyond the homework stage. Thanks

Fossils are almost always found at or near the surface. It's very rare for palaeontolgists to go out and just start digging.

So yes, in some cases that means the surface is very ancient - but it doesn't mean it's always been exposed. Rather, it was laid down, buried, and then re-exposed millions of years later.

Often, it's only part of a surface, because the rocks tilt, so if you go to far one way, the surface you are stood on will get 'younger', and the other way 'older'

Last edited by Peter Falkingham (29th Oct 2014 09:39:20)