Coryander Posted August 27, 2018 Share Posted August 27, 2018 Maybe a stupid question... Found it in Algarve, Portugal (miocene, I guess). Link to comment Share on other sites More sharing options...
Fossildude19 Posted August 27, 2018 Share Posted August 27, 2018 Looks more like a shell, like an oyster. 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...
Max-fossils Posted August 27, 2018 Share Posted August 27, 2018 Most likely not an oyster (they rarely have such regular concentric ridges), but definitely some kind of bivalve imprint. 2 Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Plax Posted August 27, 2018 Share Posted August 27, 2018 the ribbing looks like a scallop shell impression 1 Link to comment Share on other sites More sharing options...
Coryander Posted August 27, 2018 Author Share Posted August 27, 2018 Perhaps something like these Chlamys varia found in same beach? Link to comment Share on other sites More sharing options...
Max-fossils Posted August 30, 2018 Share Posted August 30, 2018 On 8/27/2018 at 8:52 PM, Coryander said: Perhaps something like these Chlamys varia found in same beach? The name is Mimachlamys varia (as described originally by Linnaeus in 1758). The ribbing is possibly caused by a scallop, but it won't be the Mimachlamys varia because as you can see the ribbing density and the rib thickness is not the same. I wouldn't rule out other bivalves though. It could actually also be caused by a gastropod, that's very possibly too. Some of them have ribs that would fit rather well the pattern shown on your rock. Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Coryander Posted August 30, 2018 Author Share Posted August 30, 2018 Thank you. Link to comment Share on other sites More sharing options...
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