New Members Tiago Posted February 21, 2021 New Members Share Posted February 21, 2021 Hello all, I found this fossil today at Portugal, Lisbon district, about 270 meters high. Anyone knows what it is? Thanks for your help. Best regards Link to comment Share on other sites More sharing options...
Rockwood Posted February 21, 2021 Share Posted February 21, 2021 I think it must be a heteromorph ammonite that had been encrusted by bivalves. 2 Link to comment Share on other sites More sharing options...
ClearLake Posted February 23, 2021 Share Posted February 23, 2021 Another option is a gastropod. I say that because it looks like it tapers to me and in some of the pictures I believe I see the columella on the inside. It would be a big snail, that for sure! Any idea on the age of the rock? 1 Link to comment Share on other sites More sharing options...
JohnJ Posted February 23, 2021 Share Posted February 23, 2021 @arthurvoss The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Scylla Posted February 23, 2021 Share Posted February 23, 2021 Looks like nerina gastropod Link to comment Share on other sites More sharing options...
fifbrindacier Posted February 23, 2021 Share Posted February 23, 2021 I agree this is a gastropod, i also see the columella. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Rockwood Posted February 23, 2021 Share Posted February 23, 2021 3 hours ago, fifbrindacier said: i also see the columella. In the center of the object, or the object is, the columella ? Link to comment Share on other sites More sharing options...
ClearLake Posted February 23, 2021 Share Posted February 23, 2021 5 hours ago, Rockwood said: In the center of the object, or the object is, the columella ? The center part of a coiled gastropod is called the columella. You usually can’t see it except when a shell is broken open (as is the case here), although it also extends from the bottom of the shell in those forms with a siphonal canal. See the illustration below that I borrowed from the Geological Museum of Trinity College in Dublin website. The columella is circled in red. I believe the specimen in question is a portion of a gastropod with the columella exposed in a couple of places. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted February 23, 2021 Share Posted February 23, 2021 1 hour ago, ClearLake said: I believe the specimen in question is a portion of a gastropod with the columella exposed in a couple of places. Yes. It probably is. I did notice the likely spiral shape, but I couldn't find one at the time. Link to comment Share on other sites More sharing options...
abyssunder Posted February 23, 2021 Share Posted February 23, 2021 Campanile? 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
fifbrindacier Posted February 24, 2021 Share Posted February 24, 2021 5 hours ago, abyssunder said: Campanile? According to its size, that would fit. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
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