Mans Posted February 5, 2023 Share Posted February 5, 2023 Hi everyone From Jurassic , could it be a fossil?What are the gray lines? regards Link to comment Share on other sites More sharing options...
Geologyhound Posted February 5, 2023 Share Posted February 5, 2023 I am thinking some sort of coral. Do you happen to have any dilute hydrochloric acid (0.1M)? If you drip some on it and it fizzes, then it is a carbonate limestone. Vinegar is a much weaker acid but will form some bubbles over time on carbonate. See if any of the attached pictures look like it. Link to comment Share on other sites More sharing options...
Mans Posted February 6, 2023 Author Share Posted February 6, 2023 Thanks Yes, they are Limestone , and the area according to the maps contains coral. Link to comment Share on other sites More sharing options...
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