Jurassicz1 Posted October 26, 2020 Share Posted October 26, 2020 I have noticed when prepping swedish belemites that when i remove matrix and shell fragments small holes come up. And its very annoying. Is there any cause to this? Is it just how i prep? I hope u can see it in the pictures. Should i polish it? Hope that someone knows the cause Link to comment Share on other sites More sharing options...
Ludwigia Posted October 26, 2020 Share Posted October 26, 2020 It's quite common to find belemnite rostra which were attacked by boring sponges which created these holes. These are fossils which tell a story. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
TqB Posted October 26, 2020 Share Posted October 26, 2020 They were attacked by all sorts of things as well as boring sponges, for example grazing echinoids, brachiopod pedicle attachments, various worms, bivalves, barnacles, algae… Never polish belemnites unless you just want jewellery - so much information can be lost, including detail of furrows which are important for identification. 4 Tarquin Link to comment Share on other sites More sharing options...
Manticocerasman Posted October 26, 2020 Share Posted October 26, 2020 On the creataceous Belemnites that we find, we also find from time to time long small groves on them. those are bite marks from sharks. It is always nice to find those, it ads a little bit more storry to them. 1 growing old is mandatory but growing up is optional. Link to comment Share on other sites More sharing options...
Johannes Posted October 26, 2020 Share Posted October 26, 2020 The most features (whom I think you mean them) are diagenetic features, not bioerosional ones. There is a thin calcite-skin on most of the clasts&fossils in Ignaberga-Limestones (but not in places where you have a grain-to-grain-contact). If you remove the small grains you expose holes in this calcite layer. But ofcourse you can find bioerosion on those belemnites like mentioned by @TqB, too (but less compared to strata where you have less hardgrounds available). Opposite, gnaw marks mentioned by @Manticocerasman are more abundant (but not abundant at all) at Ignabergas Cretaceous. Back to your question: in my opinion you should not polish, and sometimes less preparation is more/better preparation.... 1 Link to comment Share on other sites More sharing options...
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