Steph Posted April 15, 2023 Share Posted April 15, 2023 On 4/12/2023 at 9:52 PM, Nimravis said: Today I received some more of my favorite pieces to collect, trackways. I have several from this location in New Mexico. These are lower Permian in age and are from the Sangre de Cristo Formation (El Pueblo Tracksite). Those are fantastic. I, too, love trackways. I have several plates that I am working on ID. I think this one is a horseshoe crab trackway. Do you have a gallery of trackways? Steph? Link to comment Share on other sites More sharing options...
Steph Posted April 15, 2023 Share Posted April 15, 2023 On 4/8/2023 at 7:00 AM, Mart1980 said: Today I received new "old" books. Now that I also collect a lot locally, local literature is of course also part of it, isn't it?! Nice books about fossils from the Bentheimer sandstone and from Münsterland / Westphalia. With such old books I enjoy the illustrations and the "fold-out" maps. Just picked up some fossils as well. Cretaceous sea urchins from the associated region around Ahaus, Germany; Micraster cf. leskei (DES MOULINS, 1837), Infulaster excentricus (WOODWARD), Micraster glyphus (SCHLUETER, 1869). And a nice ammonite from Bentheim: Platylenticeras sp. This way I will get through Saturday morning I love the books! 1 Link to comment Share on other sites More sharing options...
ThePhysicist Posted April 15, 2023 Author Share Posted April 15, 2023 Straight from Kazakhstan, some beautiful early Lamnids: Macrorhizodus and Isurolamna Macrorhizodus americanus (praecursor) | Isurolamna bajarunasi Shorym Fm. (Middle Eocene, Bartonian), Ustyurt Plateau, Mangyshlak Penninsula, Kazakhstan The Macrorhizodus anterior (UA2) is large (1.75" slant length). It's cool to compare with its hypothetical descendant, Carcharodon hastalis, separated by 25 million years. The Isurolamna bear a remarkable resemblance to the modern mako, Isurus oxyrinchus (shown with Macrorhizodus lateral on the left): 3 "Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan "I was born not knowing and have had only a little time to change that here and there." - Richard Feynman Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | Squamates | Post Oak Creek | North Sulphur River | Lee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone Instagram: @thephysicist_tff Link to comment Share on other sites More sharing options...
Nimravis Posted April 16, 2023 Share Posted April 16, 2023 11 hours ago, Steph said: Those are fantastic. I, too, love trackways. I have several plates that I am working on ID. I think this one is a horseshoe crab trackway. Do you have a gallery of trackways? Steph? Steph- I do not have a gallery of tracks, if I can put some together, I will PM you pics. 1 Link to comment Share on other sites More sharing options...
Steph Posted April 16, 2023 Share Posted April 16, 2023 1 hour ago, Nimravis said: Steph- I do not have a gallery of tracks, if I can put some together, I will PM you pics. Cool- I’ll work on putting some of mine together to share too. I haven’t found any vertebrate tracks yet, but I think I have horseshoe crab and some pretty neat plates with nice sized burrows 1 Link to comment Share on other sites More sharing options...
Notidanodon Posted April 19, 2023 Share Posted April 19, 2023 On 4/7/2023 at 1:43 AM, pachy-pleuro-whatnot-odon said: Popped by home from my time abroad yesterday to find these two teeth waiting for me. The one is a small but beautifully preserved rooted Oxford Clay pliosaur tooth from Peterborough (Orton Pit). It was sold to me as Peloneustes philarchus, but when I compare it to my other P. philarchus tooth (left on the photograph with the ruler), the new tooth actually looks more like a Simolestes vorax to me. To start with, the overall shape of the tooth is already more robust, but, in addition, the striae are bolder and many of them run higher up towards the apex that on the P. philarchus. Moreover, it seems to me there are some striations that don't start at the base of the tooth, yet the enamel is not vermiculated. What do you think, @paulgdls and @RuMert? @msantix The second tooth is a small one and was tentatively identified as a cryptoclidid plesiosaur tooth, also from the Oxford Clay (Callovian stage) of Peterborough (Warboys Pit). There do appear to be some worn-down striae on the two lateral sides of the tooth. But what make this crown with a rounded base and missing apex particularly strange is that compression appears to be mesiodistal, whereas all other plesiosaur teeth I've seen exhibit this in the labiolingual plane. So I wonder whether it could be a fish tooth, especially seen the nature of the root/base. However, as I'm not very versed in fish teeth, especially rooted ones from the Middle Jurassic, I'm not sure of this interpretation either. It seems to me the tooth does differ in cross-section/compression from the hypsocormid teeth I've seen so far. Moreover, the striae, though not very pronounced, are quite bold when you can make them out (this in contrast to hypsocormid teeth, where they're very fine) - but restricted to the lateral sides, rather than lateral and lingual, as in most cryptoclidid plesiosaurs. At the same time, the tip and base and overall small size of the tooth make me wonder. @Al Dente, @PointyKnight, @rocket @Anomotodon and @Notidanodon Great fossils! I’m afraid I’m only any good at shark ID 1 Link to comment Share on other sites More sharing options...
Rock Hound Posted April 20, 2023 Share Posted April 20, 2023 I recently received these polished Ammonite fossils, from Madagascar; via a well known internet vendor. I am well pleased, with the specimens I received. 2 Link to comment Share on other sites More sharing options...
msantix Posted April 20, 2023 Share Posted April 20, 2023 Here is an interesting Pterosaur bone I recently acquired. It is actually a 17.5cm Pterosaur rib bone! they are surprisingly rare finds and this one is well preserved too. 4 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted April 20, 2023 Share Posted April 20, 2023 31 minutes ago, msantix said: Here is an interesting Pterosaur bone I recently acquired. It is actually a 17.5cm Pterosaur rib bone! they are surprisingly rare finds and this one is well preserved too. Very nice specimen indeed, Michael! How do you know it's pterosaur, though? 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
msantix Posted April 20, 2023 Share Posted April 20, 2023 (edited) 26 minutes ago, pachy-pleuro-whatnot-odon said: Very nice specimen indeed, Michael! How do you know it's pterosaur, though? Well it has a extremely thin bone wall, super slender and the right curve for a Pterosaur rib......but then again, I just asked David Martill and he confirmed it! Edited April 20, 2023 by msantix 1 Link to comment Share on other sites More sharing options...
Welsh Wizard Posted April 22, 2023 Share Posted April 22, 2023 I picked up a great bargain the other day. A first edition of “A Days Ramble in Lewes” by Gideon Mantell. I wanted a copy of the book but to my surprise inside the book was a letter written by Gideon Mantell. For those who don’t know, Gideon and his wife Mary found and described the second dinosaur Iguanodon. 4 Link to comment Share on other sites More sharing options...
digit Posted April 22, 2023 Share Posted April 22, 2023 Nice addition to your library! Any images inside that book? Would enjoy seeing a few images from inside the book if possible. Cheers. -Ken Link to comment Share on other sites More sharing options...
Bobby Rico Posted April 22, 2023 Share Posted April 22, 2023 3 hours ago, Welsh Wizard said: A first edition of “A Days Ramble in Lewes” by Gideon Mantell. I wanted a copy of the book but to my surprise inside the book was a letter written by Gideon Mantell. For those who don’t know, Gideon and his wife Mary found and described the second dinosaur Iguanodon. Cracking book I definitely had many Days rambling around Lewes as I lived in Brighton for 4 years . Did not find any Iguanodons sadly , cheers Bobby 1 Link to comment Share on other sites More sharing options...
Welsh Wizard Posted April 22, 2023 Share Posted April 22, 2023 1 hour ago, digit said: Nice addition to your library! Any images inside that book? Would enjoy seeing a few images from inside the book if possible. Cheers. -Ken Hi Ken will do but I don’t think there are any fossils in this one. Regarding the letter; I don’t tend to post pictures of letters or documents I own. Nick Link to comment Share on other sites More sharing options...
digit Posted April 22, 2023 Share Posted April 22, 2023 Mantell's book is said to contain several illustrations--though no fossils are shown, illustrations from back in 1846 are often delightful to see. Understandable about not posting imagery of letters and non-public documents. Cheers. -Ken 1 Link to comment Share on other sites More sharing options...
Welsh Wizard Posted April 22, 2023 Share Posted April 22, 2023 1 hour ago, digit said: Mantell's book is said to contain several illustrations--though no fossils are shown, illustrations from back in 1846 are often delightful to see. Understandable about not posting imagery of letters and non-public documents. Cheers. -Ken Thanks Ken @Bobby Rico suggested I should start a thread on old fossil and geology books etc. I will do that when I’ve some time spare. 1 Link to comment Share on other sites More sharing options...
digit Posted April 22, 2023 Share Posted April 22, 2023 54 minutes ago, Welsh Wizard said: I will do that when I’ve some time spare. Because WE ALL have lots of that elusive substance 'spare time'. Splendid idea if you have some great content and can scrape together some free moments to produce such a topic. Cheers. -Ken Link to comment Share on other sites More sharing options...
Welsh Wizard Posted April 22, 2023 Share Posted April 22, 2023 36 minutes ago, digit said: Because WE ALL have lots of that elusive substance 'spare time'. Splendid idea if you have some great content and can scrape together some free moments to produce such a topic. Cheers. -Ken Too true. The older I get the less time I seem to have. Thinking about retiring in two years. That’ll give me some more time to catch up on things. Link to comment Share on other sites More sharing options...
digit Posted April 22, 2023 Share Posted April 22, 2023 10 minutes ago, Welsh Wizard said: Thinking about retiring in two years. That’ll give me some more time to catch up on things. If you do it right, you'll be busier than ever. Cheers. -Ken 2 Link to comment Share on other sites More sharing options...
grandpa Posted April 22, 2023 Share Posted April 22, 2023 10 minutes ago, Welsh Wizard said: Thinking about retiring in two years. That’ll give me some more time to catch up on things. Nope, no it won't. Oddly, it really doesn't work out that way. Can't explain "why", just "that". 1 Link to comment Share on other sites More sharing options...
Welsh Wizard Posted April 22, 2023 Share Posted April 22, 2023 5 hours ago, digit said: Nice addition to your library! Any images inside that book? Would enjoy seeing a few images from inside the book if possible. Cheers. -Ken There’s only a few. Definitely no fossils. 1 Link to comment Share on other sites More sharing options...
digit Posted April 22, 2023 Share Posted April 22, 2023 I do enjoy the artistic illustrations of older books which now would be replaced with a simple photograph. That book looks to be in great condition for something 177 years old. Cheers. -Ken 2 Link to comment Share on other sites More sharing options...
Rock Hound Posted April 23, 2023 Share Posted April 23, 2023 Four, of my favorite Types of Fossils: Fossil Fish Ammonites Shark Teeth Trilobites The Ammonite on the left, is from my most recent order: 3 Link to comment Share on other sites More sharing options...
Bobby Rico Posted April 23, 2023 Share Posted April 23, 2023 45 minutes ago, Rock Hound said: Four, of my favorite Types of Fossils: Fossil Fish Ammonites Shark Teeth Trilobites I see we are similar, I too have never been able to focus my collection. My favourite are Ammonites, Corals , Scale Trees and Ichnites mainly footprint, I only have 3 but I did get one footprint for Christmas off a TFF members that really made my Christmas Day . Nice smorgasbord of fossils you have their . Cheers Bobby Link to comment Share on other sites More sharing options...
Rock Hound Posted April 23, 2023 Share Posted April 23, 2023 7 hours ago, Bobby Rico said: I see we are similar, I too have never been able to focus my collection. My favourite are Ammonites, Corals , Scale Trees and Ichnites mainly footprint, I only have 3 but I did get one footprint for Christmas off a TFF members that really made my Christmas Day . Nice smorgasbord of fossils you have their . Cheers Bobby Thank you. People say variety, is the spice of life. 1 Link to comment Share on other sites More sharing options...
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