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Hi all, I'm a total newby but have always been fascinated by fossils, geodes (especially Brazil/Uruguay amethyst) and Roman / Greek / Byzantine coins. I have a nice collection, and have recently purchased some Whitby, Yorkshire ammonite nodules. I'm using the freeze thaw method to open them, as I tried cracking two and both are damaged. However, one nodule is brown, not the black shale as the others, and really soft - I can remove the concrete with my fingernails. My question is how a 180 million year old fossil can be so well preserved in soft mudstone, and is this something others have seen? Was it free of concretion and then collected a new one? It's in very good, nearly complete condition. I'll send a pic shortly.
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I found this huge rock in Dorset, it has a very obvious open seam with some crystallisation. Any tips of how I can crack it open neatly? Thank you so much
- 2 replies
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- ammonite
- jurrassic coast
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advice on opening concretions without damaging fossils inside?
- 12 replies
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- chemical preparation
- location
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