Skip navigation

The NaturePlus Forums will be offline from mid August 2018. The content has been saved and it will always be possible to see and refer to archived posts, but not to post new items. This decision has been made in light of technical problems with the forum, which cannot be fixed or upgraded.

We'd like to take this opportunity to thank everyone who has contributed to the very great success of the forums and to the community spirit there. We plan to create new community features and services in the future so please watch this space for developments in this area. In the meantime if you have any questions then please email:

Fossil enquiries:
Life Sciences & Mineralogy enquiries:
Commercial enquiries:

143 Views 2 Replies Last post: Aug 10, 2018 4:36 PM by Dirt fisher RSS
Currently Being Moderated

Jul 29, 2018 6:24 PM




This was found on a Norfolk beach today and was wondering if it is fossilised poo?. It certainly looks like it but it is very heavy for its size.


Thanks for looking



  • Currently Being Moderated
    Jul 30, 2018 10:21 AM (in response to Dirt fisher)
    Re: Coprolite?

    Hi - this is FeS2 - iron pyrite (Fool's Gold).  Formed by bacteria in the seabed - probably Late Cretaceous.


    There is a connection with organic matter and sometimes pyrite can replace fossils (see below).  To ID a coprolite one really needs to see fragments of other organisms within, or a spiral mark (shark).  Yours probably replaced crustacean burrows in (I assume) the Chalk sea bed. 


    A fresh surface will show steely grey or brassy radiating crystals sometimes called "Marcasite".


    Lft Clk to enlarge

    Pyrite for CHCC.jpg


    • Report Abuse

More Like This

  • Retrieving data ...

Bookmarked by (0)