Uncle Siphuncle Posted June 15, 2013 Share Posted June 15, 2013 i can put you on some bigguns! Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
Ludwigia Posted June 15, 2013 Author Share Posted June 15, 2013 i can put you on some bigguns! Sorry, I don't really speak much Texan and don't quite understand what you mean with me being on some bigguns. The only word in Texan that I know by heart is "Y'all", although I believe it has its etymological origins somewhere between the Appalachians and Georgia.... Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted June 19, 2013 Author Share Posted June 19, 2013 (edited) Here's one that won't end up in the display case, but I'll be storing it in a drawer as a sample that may very well have been the victim of a predator. The shell has been broken open at exactly the same point on both sides right where the phragmocone meets the living chamber, which may have been caused by a well-placed bite. A. opalinoides. 6cm. With a Myophorella cf. formosa bivalve associated. Edited December 25, 2014 by Ludwigia Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Terry Dactyll Posted June 19, 2013 Share Posted June 19, 2013 (edited) Roger.... Is that the first shell you have come across from that exposure with this damage?...Your probably familiar with the Promiceras story... see the link...The outer edge looks intact on your specimen.... http://news.bbc.co.uk/local/dorset/hi/people_and_places/nature/newsid_9225000/9225848.stm Edited June 19, 2013 by Terry Dactyll Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Ludwigia Posted June 19, 2013 Author Share Posted June 19, 2013 (edited) Roger.... Is that the first shell you have come across from that exposure with this damage?...Your probably familiar with the Promiceras story... see the link...The outer edge looks intact on your specimen.... http://news.bbc.co.uk/local/dorset/hi/people_and_places/nature/newsid_9225000/9225848.stm No, I actually didn't know about that particular one, but do you remember my recent post near the bottom of this page? http://www.thefossilforum.com/index.php?/topic/37516-a-trip-to-the-swiss-middle-jurassic/page-2 The squid theory is making the rounds right now. One can distinguish it apparently by the form of the bite. One side like a 'V', the other like a 'W'. If the shell hasn't been further damaged or eroded afterwards, then it's a good bet. I'm not so sure about this one, though. There's no obvious form. It just looks like something with teeth wrapped its mouth around it and bit. Maybe one of those shell-cracking monster fish. Edited June 19, 2013 by Ludwigia Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Terry Dactyll Posted June 19, 2013 Share Posted June 19, 2013 Roger.... No lol... i'd forgot...and I had answered that one to.... i'm off with the cuckoo's lately.... I personally don't think we can discount Nautilus predating on small ammonite shells either....... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Ludwigia Posted June 19, 2013 Author Share Posted June 19, 2013 (edited) You're probably right, Steve. Nautilus is also a possibility. I've had a closer look at the ammonite which I'd ID'd above as a possible S.discoidea and have decided that it might rather be Staufenia sehndensis. The missing part of the keel bothered my aesthetic eye, so I've filled it out with stonemeal. The following ammonite, the last of my finds from the last trip that's found its way into the collection, is an interesting piece. If you look closely at the picture below, you can see a line running through the ammonite, the matrix and the bivalve below. The rock along with its fossil content was split through the local tectonic workings and was healed again after water-soluble calcite fell out and hardened in the crack. The right side of the stone is raised about 1mm. higher than the left. This one was also not quite complete, so I filled out the missing part of the keel on the right hand side with a mix of plaster of paris and stonemeal. The calcite steinkern of the phragmocone is also nice to look at. C. sinon with a circumference of 15.5cm. Edited December 25, 2014 by Ludwigia Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Terry Dactyll Posted June 19, 2013 Share Posted June 19, 2013 Roger.... the fracture and subsequent displacement is quite funky and unusual.... I don't think i have seen that before...I have had calcite veins without the movement.... Very nice.... Nautilus.... Yes the size of the predated shells I have seen tend to be all small (under 35 mm or so) so its definitely viable that ammonites became part of the nautilus staple diet as they were abundant in comparison... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Ludwigia Posted June 23, 2013 Author Share Posted June 23, 2013 Just finished another double. This time with Ludwigia (Ludwigia) bradfordensis deleta and the smaller microconch Ludwigia (Pseudographoceras) umbilicata, at least I think that's the right ID for both of them. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Terry Dactyll Posted June 24, 2013 Share Posted June 24, 2013 Roger...Very nice pair... I have borrowed an air abrasive for a little while... (just need to build a cabinet)....over the years I got 2 or 3 bits that need abrading hanging around...its made me semi skilled .. I liken it to driving an automatic car... point it in the right direction give it a squirt and the machine does the rest ... brilliant for the smaller stuff... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Ludwigia Posted June 24, 2013 Author Share Posted June 24, 2013 Thanks Steve. Yes, you're right about the cabinet, otherwise you'll end up with emphysema . A whole new world can open up with an abrader, but you just have to watch the pressure, otherwise you'll blow the best parts away... Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted June 25, 2013 Author Share Posted June 25, 2013 Here's another one. The phragmocone and a bit of the living chamber of a Staufenia staufensis in calcite mold form where the lobes come out very well. It has a circumference of 12cm. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted July 1, 2013 Author Share Posted July 1, 2013 i can put you on some bigguns! I know what bigguns are now! They cause overweight on aircraft. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Diego Posted July 1, 2013 Share Posted July 1, 2013 Verry Nice prepping job eOn those beauty's Link to comment Share on other sites More sharing options...
Terry Dactyll Posted July 1, 2013 Share Posted July 1, 2013 Roger.... the sutures are pretty unusual.... Very nice.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Ludwigia Posted July 2, 2013 Author Share Posted July 2, 2013 Verry Nice prepping job eOn those beauty's Thanks! Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted July 2, 2013 Author Share Posted July 2, 2013 Roger.... the sutures are pretty unusual.... Very nice.... Staufensis sutures are really quite remarkable, perhaps because of its extreme oxycone form. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
MikeDOTB Posted July 2, 2013 Share Posted July 2, 2013 Awesome preservation! Great finds and prep! DO, or do not. There is no try. Link to comment Share on other sites More sharing options...
Ludwigia Posted July 2, 2013 Author Share Posted July 2, 2013 Thanks Mike! Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
BOBCAT Posted July 2, 2013 Share Posted July 2, 2013 Awesome finds im truly in awe Link to comment Share on other sites More sharing options...
barefootgirl Posted July 2, 2013 Share Posted July 2, 2013 Those ammonites are fantastic! In formal logic, a contradiction is the signal of defeat: but in the evolution of real knowledge, it marks the first step in progress toward victory. Alfred North Whithead 'Don't worry about the world coming to an end today. It's already tomorrow in Australia!' Link to comment Share on other sites More sharing options...
Ludwigia Posted July 3, 2013 Author Share Posted July 3, 2013 Awesome finds im truly in awe Thanks! Been down to the bluffs lately? I hear that with a bit of luck you can find some Pleistocene fossils there. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Ludwigia Posted July 3, 2013 Author Share Posted July 3, 2013 Those ammonites are fantastic! Thanks, Tera. Aren't they beautiful? I love that site! Still got a few more things on the go that I'll be posting later. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Nothos Posted July 3, 2013 Share Posted July 3, 2013 Roger, you seems to have a beautiful collection with so nice and well prepared specimens. All my respect for your work. Wish I could visit your collection , it's something I love to do ! Link to comment Share on other sites More sharing options...
Nothos Posted July 3, 2013 Share Posted July 3, 2013 Do you collect only these 2 periods ? Link to comment Share on other sites More sharing options...
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