Parasaurolophus Walkeri Posted August 7 Share Posted August 7 Found some Ammonites at a store in MT. The store owner said he got them at a fossil show in AZ, so I don't know where they were found. What genera are they? Also, what are these little patterns on my ammonites? The pattern is on both, but is easier to see on one. 1 Link to comment Share on other sites More sharing options...
Parasaurolophus Walkeri Posted August 7 Author Share Posted August 7 The pattern is easiest to see on the smaller opalised (opalized?) one and is at the base where the tentacles would come out of. The bigger one, as previously mentioned, has a similar pattern, but it isn’t visible in the shot because it is covered in a chalk like substance (probably chalk). Link to comment Share on other sites More sharing options...
PaleoNoel Posted August 7 Share Posted August 7 I believe these are from Madagascar, Early Cretaceous if I remember correctly. Not sure about the formation. The patterns you are seeing are called sutures, which delineate the chambers of the shell. Link to comment Share on other sites More sharing options...
Parasaurolophus Walkeri Posted August 7 Author Share Posted August 7 And about the bright image with the 2”, I screenshotted that in measure (I’m on my phone) to give you a size for one as a reference. Link to comment Share on other sites More sharing options...
Parasaurolophus Walkeri Posted August 7 Author Share Posted August 7 Thank you Paleonoel! This is my first post and I got an instant response! Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 7 Share Posted August 7 They are commonly referred to as Cleoniceras (smooth one) and Perisphinctes ammonites. Not sure of the actual correct names, but a Google search will show you similar Madagascan ammonites. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "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...
Parasaurolophus Walkeri Posted August 7 Author Share Posted August 7 Thanks! Link to comment Share on other sites More sharing options...
Ludwigia Posted August 7 Share Posted August 7 Tim beat me to it. I agree. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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