IsaacTheFossilMan Posted May 2, 2023 Share Posted May 2, 2023 My better half has just rediscovered some of her old fossils from years ago - as such, she does not know the provenance, though based on the matrix and preservation, I believe them to be Cotswoldian in origin - Jurassic, Inferior/Greater Oolite. These two in particular absolutely had us stumped - This is number one - I originally thought disarticulated crinoid, but the 'branching' pattern in picture 2 threw me off a lot, going to bryozoans and all sorts, bouncing around til' I decided, maybe, not a fossil? But then again, it displays the glow from calcite: And, secondly: The gap between the layers suggests to me that something dissolved - a shell? Any input appreciated! Isaac ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 12, 2023 Share Posted May 12, 2023 The second one looks sponge like, to me. Not sure on the first one at all. Bryozoan sounds reasonable, but I have no knowledge of this area. Maybe @TqB or @Tidgy's Dad will have some ideas? 3 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 12, 2023 Share Posted May 12, 2023 The second one is quite likely a sponge as flint and chert nodules from this area and age, especially if it's Cretaceous, are often formed around spomges and the look seems to fit the bill. The first one I'm far less sure about. It's not a crinoid, maybe a coral? 1 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
TqB Posted May 13, 2023 Share Posted May 13, 2023 (edited) I agree with @Tidgy's Dad that the second one is a sponge in Cretaceous flint, most likely from superficial gravel. The first is puzzling. There's no coral internal structure visible. Possibly a sponge but I'm leaning toward weathered banded flint; the texture looks right. An image search will show good examples, some with the deeper ridging that makes them especially confusing objects. And from this forum: http://www.thefossilforum.com/index.php?/topic/76996-fossil-help/ Pieces like this may have originated in burrow systems in the chalk, so effectively a modified trace fossil. Edited May 13, 2023 by TqB 2 1 Tarquin Link to comment Share on other sites More sharing options...
doushantuo Posted May 13, 2023 Share Posted May 13, 2023 (edited) first one might be a tiny example of paramoudra(which is a qualified form of flint,BTW) Edited May 13, 2023 by doushantuo Link to comment Share on other sites More sharing options...
IsaacTheFossilMan Posted May 13, 2023 Author Share Posted May 13, 2023 30 minutes ago, doushantuo said: first one might be a tiny example of paramoudra(which is a qualified form of flint,BTW) I agree, type-B paramoudra. ~ Isaac; www.isaactfm.com "Don't move! He can't see us if we don't move!" - Alan Grant Come to the spring that is The Fossil Forum, where the stream of warmth and knowledge never runs dry. Link to comment Share on other sites More sharing options...
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