Gully.moy Posted April 30, 2020 Share Posted April 30, 2020 Found this little flint nodule in the stream below Blackgang Chine, halfway down the coastal landslip there. It has very distinct little pimples in a conical hollow that finishes in a flat surface. It looks very reminiscent of Echinoids, but different to any I’ve seen before. I believe the local strata are gault clay topped with greensand formation. Any ideas? Cheers! Link to comment Share on other sites More sharing options...
TqB Posted April 30, 2020 Share Posted April 30, 2020 That's beautiful! I believe it's the mould of a sponge, the pimples corresponding to openings on the outside. At the bottom of the cavity there's more complete preservation, with the internal galleries filled with flint. Probably hard to ID further, and they often need a specialist, but the pimples are arranged quite regularly so look at Ventriculites for something that's at least similar. 4 Tarquin Link to comment Share on other sites More sharing options...
caterpillar Posted April 30, 2020 Share Posted April 30, 2020 Takes plasticine, fills the hole and unmolds. You will have a better idea 1 http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
TqB Posted April 30, 2020 Share Posted April 30, 2020 Try the plasticine impression. Another sponge interpretation could be Verruculina, with flint filling hollows in the projections - might explain the double layer at the top. From this forum: 1 Tarquin Link to comment Share on other sites More sharing options...
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