belemniten Posted March 8, 2016 Share Posted March 8, 2016 I found this in Rosenfeld (Germany). Its from the "Arietenkalk". Think it could be a crinoid stem, but this would be very unusual for this location. Please help me Many greetings from Germany ! Have a great time with many fossils Regards Sebastian Link to comment Share on other sites More sharing options...
fossilized6s Posted March 8, 2016 Share Posted March 8, 2016 100% crinoid stem. ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG Link to comment Share on other sites More sharing options...
Auspex Posted March 8, 2016 Share Posted March 8, 2016 100% crinoid stem. Yes "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
caldigger Posted March 8, 2016 Share Posted March 8, 2016 "but this would be very unusual for this location." Well then, it seems you have found a rarity, congrats!!! Link to comment Share on other sites More sharing options...
MeargleSchmeargl Posted March 9, 2016 Share Posted March 9, 2016 This would appear to be a crinoid, as stated. Every single fossil you see is a miracle set in stone, and should be treated as such. Link to comment Share on other sites More sharing options...
Rockwood Posted March 9, 2016 Share Posted March 9, 2016 100% crinoid stem. One could argue the percentage. Where's the lumen ? Appears to be a cast. Link to comment Share on other sites More sharing options...
TqB Posted March 9, 2016 Share Posted March 9, 2016 (edited) One could argue the percentage. Where's the lumen ? Appears to be a cast. The lumen is tiny in a lot of Pentacrinites/Isocrinus type crinoids. That looks like normal echinoderm calcite cleavage so maybe it's just filled in by a bit of diagenetic calcite growth. edit: I've just looked at a few of mine from the Lower Lias and the lumens are completely invisible in them. Edited March 9, 2016 by TqB 3 Tarquin Link to comment Share on other sites More sharing options...
abyssunder Posted March 9, 2016 Share Posted March 9, 2016 I agree. The Arietenkalk Formation in Germany date back to the Jurassic. " The Hettangian-Sinemurian boundary is marked by the hiatus. The Arietenkalk Formation (up to 25m) is characterized by fossil-rich limestone beds with intercalated clay layers. The base is defined by the "Kupferfelsbank",a limestone bed with locally abundent iron ooids and bored pebbles. Gryphaeid oysters,giant ammonites (Arietitidae),brachiopods and echinoderm clasts are the most important fossils in this formation (Geyer&Gwinner 1984). The Arietenkalk Formation is overlain by the Optususton Formation (up to 65m). The dark grey clays and marly clays often exhibit concretions of siderite and phosphorite; quartz sand and mica increase upwards. Several fossil-rich marl layers occure in the upper part of the succesion;cach marks the onset of a different ammonite fauna. Other common fossils include brachiopods,bivalves,ammonites and crinoids (Geyer&Gwinner 1984). " The geology of Central Europe, Vol 2: Mesozoic and Cenozoic - Tom McCann The lumen in this kind of crinoid columnals is tiny and when is infilled with recrystallized sediments is almost indistinguishable. 3 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
belemniten Posted March 9, 2016 Author Share Posted March 9, 2016 Thanks guys for your help ! All posts are very helpful ! thanks So i am lucky that i found an crinoid stem Many greetings from Germany ! Have a great time with many fossils Regards Sebastian Link to comment Share on other sites More sharing options...
Rockwood Posted March 9, 2016 Share Posted March 9, 2016 100.01 % Link to comment Share on other sites More sharing options...
Twinlukers Posted March 10, 2016 Share Posted March 10, 2016 Crinoid stem as well!!! Nice find Link to comment Share on other sites More sharing options...
belemniten Posted March 10, 2016 Author Share Posted March 10, 2016 100.01 % Crinoid stem as well!!! Nice find Thanks ! Many greetings from Germany ! Have a great time with many fossils Regards Sebastian Link to comment Share on other sites More sharing options...
Guguita2104 Posted March 12, 2016 Share Posted March 12, 2016 For sure crinoid stems. Congratulations, belemniten for your uncommon find... Here in Portugal they are abundant on Jurassic layers. Regards, Guguita Link to comment Share on other sites More sharing options...
belemniten Posted March 13, 2016 Author Share Posted March 13, 2016 For sure crinoid stems. Congratulations, belemniten for your uncommon find... Here in Portugal they are abundant on Jurassic layers. Regards, Guguita Thanks Many greetings from Germany ! Have a great time with many fossils Regards Sebastian Link to comment Share on other sites More sharing options...
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