docdutronc Posted November 15, 2009 Share Posted November 15, 2009 I did some trading with collectors , Dave for USA and Steve for the United Kingdom , Spain , here are a few leaves of ferns Neuropteris to compare Link to comment Share on other sites More sharing options...
docdutronc Posted November 15, 2009 Author Share Posted November 15, 2009 What deposit ???? it is easy ..... Link to comment Share on other sites More sharing options...
Terry Dactyll Posted November 15, 2009 Share Posted November 15, 2009 (edited) Bruno.... I love the variation of preservation on these specimens... What deposit? 1- is that your french material? 2- I have seen some German material like this..westphalian (piesberg) 3- is Westphalian .... Uk lol 4- (i'll change this to northern france, and hope no body notices) 5- StClair pensylvanian 6- Spanish? 7- French again ... 8- Spanish? Thats all i know for now I think...Guessing Edited November 16, 2009 by Terry Dactyll Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Shamalama Posted November 16, 2009 Share Posted November 16, 2009 I have very little familairity with world wide material, but here goes: 1. France 2. Germany or Poland 3. UK 4. St. Clair 5. St. Clair 6. Poland 7. Spain 8. Spain -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
fig rocks Posted November 16, 2009 Share Posted November 16, 2009 Very nice acquisitions doc! Link to comment Share on other sites More sharing options...
docdutronc Posted November 16, 2009 Author Share Posted November 16, 2009 the solution ..... Link to comment Share on other sites More sharing options...
Terry Dactyll Posted November 17, 2009 Share Posted November 17, 2009 Thats me paying for a resit..... glad I got the Uk one right lol.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
docdutronc Posted November 18, 2009 Author Share Posted November 18, 2009 (edited) This main axis of fern species belongs to the Neuropterids, the orientation shows that pinnae were attached in this order, the rachis and axis are called Aulacopteris and foliage Neuropteris......these rachis do not wear hairs and spines, they are striated longitudinally .... Edited November 19, 2009 by docdutronc Link to comment Share on other sites More sharing options...
Shamalama Posted November 19, 2009 Share Posted November 19, 2009 Another great intuitive interpretation, Bruno. Had I found that I would have noted both the branch and leaves but never made the connection. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
Plantguy Posted November 22, 2009 Share Posted November 22, 2009 Bruno, nice variety. I have to admit I failed the test! I now have one for you. Unfortunately, I dont have any provenance on this concretion so I can't provide the answer. It came unidentified from a collection I acquired--although it was mentioned that it may be from somewhere in the western U.S. since the collector did collecting there ? not Mazon Creek. Any thougths? Regards, Chris Link to comment Share on other sites More sharing options...
docdutronc Posted December 4, 2009 Author Share Posted December 4, 2009 Bruno, nice variety. I have to admit I failed the test! I now have one for you. Unfortunately, I dont have any provenance on this concretion so I can't provide the answer. It came unidentified from a collection I acquired--although it was mentioned that it may be from somewhere in the western U.S. since the collector did collecting there ? not Mazon Creek. Any thougths? Regards, Chris Hi chris fossilization in nodule or concretion makes me think of the material found in the Mazon Creek aera, but without certitutes to the location by cons believe I recognize a piece of Neuropteris and a fragment of pecoteris bruno Link to comment Share on other sites More sharing options...
Terry Dactyll Posted December 4, 2009 Share Posted December 4, 2009 Chris.... I like it, i hadnt noticed the nodule previously....Looking closely at the photo, it appears the tip of the big leaf could very well be in there and would become visible with an educated 'tap' with a tiny chisel...Ive used a small dremmel type grinding disc before now to create the 'correct surface angle' in preparation for such a 'educated tap' in the past for the chisel to 'purchase onto' and it has worked on carb material.... it might be worth looking under a microscope at it first to see if there is a visible seperation layer or gap.... If not then i would leave it alone.... Its beautiful.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
Guest guppy-boy Posted December 5, 2009 Share Posted December 5, 2009 good job !! Link to comment Share on other sites More sharing options...
Plantguy Posted December 5, 2009 Share Posted December 5, 2009 Bruno, thanks for looking and your feedback. Yep, I wish I had some details...unfortunately provenance information gets lost all too often as has happened with this specimen. Terry Dactyll, I do believe that tip is there and I surely want to see it. However, my expertise ain't up to the level yet to make it appear. My earlier practice on some other Mazon Creek nodules resulted in a few choice utterations that I'm sure my neighbors didn't fully appreciate. Freezing/thawing had no effect on this one recently but that chisel blow sure did the trick...Pecopterid pieces every where...here's what I found of the specimen.. Next time I need to turn up the radio much louder to drown out my "practicing comments". Successful removal of this minor overburden will have to wait for the time being! Regards, Chris Link to comment Share on other sites More sharing options...
Terry Dactyll Posted December 5, 2009 Share Posted December 5, 2009 Chris..... its all about weakening the rock in a way that it allows the chunk to be guided where it breaks... its not rocket science but confidence I suppose so yes, leave it be until you feel upto it.... Cheers Steve... And Welcome if your a New Member... Link to comment Share on other sites More sharing options...
docscheuchzeri Posted December 5, 2009 Share Posted December 5, 2009 hi I'm Hervé ,we play on the same field Link to comment Share on other sites More sharing options...
Plantguy Posted December 5, 2009 Share Posted December 5, 2009 Steve, thanks for the encouragement! I definitely have the knack for weaking the specimens ---its the latter part about guiding where it breaks that shows how skilled you and the others are in fossil prep! I am truly in awe at what you all can do! Thanks! Chris Link to comment Share on other sites More sharing options...
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