Saw recent Dinosaur poop? thread and thought I would post. Found this on a walk through a field in Kent where there is lots of flint and chalk in soil. I'm a complete novice, but it looks similar to a marcasite nodule, though I had hoped it might be a coprolite of some sort... If marcasite, what could it look like if broken open?
It appears to be a Marcasite/Pyrites nodule its internal structure will be fan like from one or more points http://gwydir.demon.co.uk/jo/minerals/marcasite.htm it may or may not be around a fossile structure I am not sure wether its worth bash to find out