PaleoOrdo Posted August 10, 2020 Share Posted August 10, 2020 I foud these two stones on a fossil hunting trip some weeks ago. The fossil on the below stone seems to be a gastropod (size about 3 cm), but is the other a sponge? Anyone have an idea? Both are from middle ordovicium, Oslo-field in Norway. Martin Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 10, 2020 Share Posted August 10, 2020 @TqB Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
Bev Posted August 10, 2020 Share Posted August 10, 2020 The gastropod may be the flat side of a Maclurites sp. which would be an Ordovician index fossil - only lived during the Ordovician period. Could the other one be a strom - bacteria strings? The more I learn, I realize the less I know. BluffCountryFossils.NET Fossil Adventure Blog Go to my Gallery for images of Fossil Jewelry, Sculpture & Crafts Pinned Posts: Beginner's Guide to Fossil Hunting * Geologic Formation Maps Link to comment Share on other sites More sharing options...
Wrangellian Posted August 11, 2020 Share Posted August 11, 2020 I'm going to suggest stromatoporoid, knowing that that's probably wrong and someone will likely come along and tell us what it really is.. Link to comment Share on other sites More sharing options...
JimB88 Posted August 11, 2020 Share Posted August 11, 2020 It looks like the underside of a stromatoporoid sponge or an encrusting bryozoan to me. The gastropod looks more like Liospira to me. Link to comment Share on other sites More sharing options...
PaleoOrdo Posted September 14, 2020 Author Share Posted September 14, 2020 After read myself up on the topic of gastropods, I conclude that @Bev is right, that it is not a Liospira but at Maclurites. As one member wrote in 2012 on this website: "If you look at a Maclurites there is no rise with the whorls. The direction of the whorls are also different, Maclurites coils clockwise, and Liospira coils counterclockwise." That is, curling leftwards or sinistral. Moreover it seems to be Maclurites specie no. 1, not no. 2, because of the size. See: https://www.researchgate.net/publication/242194242_EARLY_ORDOVICIAN_GASTROPODS_OF_THE_BARBACE_COVE_MEMBER_BOAT_HARBOUR_FORMATION_AND_CATOCHE_FORMATION_WESTERN_NEWFOUNDLAND Intersting that I have found an index fossil, so now I am sure the site is really ordovicium, although it remains unsure for me if it is middle or late ordovicium. Martin Link to comment Share on other sites More sharing options...
PaleoOrdo Posted October 14, 2020 Author Share Posted October 14, 2020 After reading more about stromatoporoid, I agree with JimB88 that it is a sponge, because of the "brick-like structure". Martin Link to comment Share on other sites More sharing options...
PaleoOrdo Posted October 18, 2020 Author Share Posted October 18, 2020 An ordovician stone I found at first sight seemed not interesting, but then I broke of a part and did see this forms. Is it a fossil? The structure is about 4-5 cm long. It has a clear pink color, never seen anything like it. Anyone can help with ID? Link to comment Share on other sites More sharing options...
PaleoOrdo Posted October 26, 2020 Author Share Posted October 26, 2020 If I should guess, this is maybe a sponge? Link to comment Share on other sites More sharing options...
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