Bianca Posted October 21, 2021 Share Posted October 21, 2021 Hello all, Last Saturday our geology club went on a field trip to the Breckweg limestone quarry in Rheine, Germany. Although my main interest lies with minerals, I found a nice fossil. I have been trying to identify it, but unfortunately without any succes. I hope you can help me out. According to the information I received, the limestone found at the quarry is from the Cenomanian. Thanks in advance! Link to comment Share on other sites More sharing options...
Rockwood Posted October 21, 2021 Share Posted October 21, 2021 I think gastropod would be a good possibility. I don't see definite indications however. Link to comment Share on other sites More sharing options...
Ludwigia Posted October 21, 2021 Share Posted October 21, 2021 Could also be a group of Gryphaea type oysters. The one on the top in the 2nd photo gives me that impression. 1 4 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
caterpillar Posted October 21, 2021 Share Posted October 21, 2021 +1 for Oysters http://www.paleotheque.fr Link to comment Share on other sites More sharing options...
Rockwood Posted October 21, 2021 Share Posted October 21, 2021 I see. Gastropods would likely show a cleaner growth pattern. Oysters are the 'tack it on' type. Designed (selective pressure) to inhabit soft sediments I believe ? Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted October 21, 2021 Share Posted October 21, 2021 Hello, Bianca, and a very warm welcome to TFF from Morocco. I also think it looks like a group of oysters from the family Gyphaeidae. Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Bianca Posted October 21, 2021 Author Share Posted October 21, 2021 Thanks a lot for your help and warm welcome I took a look at the Gryphaea oysters and the shape seems to match, even though the shells on the specimen are not entirely visible. Would further determination (to a certain species) also possible or is that a bridge too far? Most pictures I found of Gryphaea seem to be less smooth (i.e. have a more distinctive growing pattern) than mine and do not seem to have the striped pattern that mine have. Link to comment Share on other sites More sharing options...
Rockwood Posted October 21, 2021 Share Posted October 21, 2021 1 hour ago, Bianca said: Thanks a lot for your help and warm welcome I took a look at the Gryphaea oysters and the shape seems to match, even though the shells on the specimen are not entirely visible. Would further determination (to a certain species) also possible or is that a bridge too far? Most pictures I found of Gryphaea seem to be less smooth (i.e. have a more distinctive growing pattern) than mine and do not seem to have the striped pattern that mine have. I'm afraid from these examples you would need a ferry boat to a species determination. Better examples, or exposures would be needed. The smoothness of the surface could be the result of erosion, and the coloration is not a problem to the ID. It could be original or diagenetic. Link to comment Share on other sites More sharing options...
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