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Showing results for tags 'calcium'.
Found 4 results
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Good evening everyone depending on where you live. I'm new to rocks and fossils and I wanted to see if anyone knew what this strange rock formation may be. I live in Central Michigan where the rock was found. Attached images. Thank you much!
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I have some Cucullaea gigantea mud impressions with shell fragments still left. These fragments are extremely fragile. Is there anyway to store or preserve them to keep the shell pieces on?
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Hello, I have many crinoid columnals that I collected in gravel (I suppose it was river/creek gravel collected and sold by a "sand and gravel" company) in Illinois many years ago. I have two questions that may be obvious to more seasoned fossil hunters/students. 1) Exactly how did the crinoids actually grow, meaning, how did the stems' diameter expand horizontally in size as time went on, since the stems were mostly composed of hard calcium carbonate/lime. In other words, it seems that once they are "hardened" or "frozen" into a certain size, how can they get bigger? Was the
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