Malach Posted October 29, 2022 Share Posted October 29, 2022 (edited) Edited October 29, 2022 by Malach Link to comment Share on other sites More sharing options...
Ludwigia Posted October 29, 2022 Share Posted October 29, 2022 Looks like an eroded recent shell. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Brandy Cole Posted October 29, 2022 Share Posted October 29, 2022 This looks like it could possibly be a fossil bivalve. Bivalves have been around for about 500 million years. But as @Ludwigia said, it could also be modern. Posting the general location where you found something and providing several pictures in bright light that show detail can be very helpful in narrowing things down. 1 Link to comment Share on other sites More sharing options...
Malach Posted October 29, 2022 Author Share Posted October 29, 2022 (edited) 37 minutes ago, Brandy Cole said: This looks like it could possibly be a fossil bivalve. Bivalves have been around for about 500 million years. But as @Ludwigia said, it could also be modern. Posting the general location where you found something and providing several pictures in bright light that show detail can be very helpful in narrowing things down. I hope these will help, I found it at Anyer beach, Indonesia, size around 2 cm Edited October 29, 2022 by Malach Link to comment Share on other sites More sharing options...
ClearLake Posted October 30, 2022 Share Posted October 30, 2022 Does Anyer Beach, Indonesia have any sedimentary rocks nearby that could erode fossils onto the beach? If so, what age are the rocks? Are fossils known from the area? If not, then there is no reason to think that this shell and several others you have posted are not recent. Link to comment Share on other sites More sharing options...
hemipristis Posted October 30, 2022 Share Posted October 30, 2022 (edited) Your shell is a member of the Family Pholadidae, a group of bivalves that bore their way into softer rock such as limestone, and wood. They are very common in tropical Pacific waters. As there are current, living reefs just offshore from Anyer Beach, it is likely recent. Below is a photo of living specimens that have bored into wood Edited October 30, 2022 by hemipristis 2 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Malach Posted October 30, 2022 Author Share Posted October 30, 2022 4 hours ago, ClearLake said: Does Anyer Beach, Indonesia have any sedimentary rocks nearby that could erode fossils onto the beach? If so, what age are the rocks? Are fossils known from the area? If not, then there is no reason to think that this shell and several others you have posted are not recent. I found plenty of them (sedimentary) on my trip, but I have no idea how old they are, and there hasn't been any fossil research from that area Link to comment Share on other sites More sharing options...
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