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Miocene Pea Crab Preparation


DarasFossils

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Hello, I am new to fossil preparation but I bought one of those Miocene Crab concretions, but I am not sure how to separate the rock without damaging the crab inside. I only have dental tools and chisels, but they are not enough to separate the two sides for a pos/neg display that I could like. What sorts of tools could I use for the job? It is something similar to the picture below.

crab-fossil-decapoda-F01WPE.jpg

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  To split a crab concretion where you end up with a crab on one side and the impression of the crab on the other is just about impossible.  I've popped open thousands and Im not sure if I've seen that?  At least not perfectly.  Best option for such a small crab is microscope and mini scribe and lots of prep time.  Best of luck

 

RB

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19 hours ago, RJB said:

  To split a crab concretion where you end up with a crab on one side and the impression of the crab on the other is just about impossible.  I've popped open thousands and Im not sure if I've seen that?  At least not perfectly.  Best option for such a small crab is microscope and mini scribe and lots of prep time.  Best of luck

 

RB

Thank you! I don't expect it to be perfect, but the one they showed me at the shop was so compressed I didn't think it would carve and they suggested I split it. I'm too scared to hit it with a hammer though! I'm planning on buying an air scribe soon so I may just try that.

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crabfossilsteve

Is it just me, or does anyone else think that this is really not a California pea crab.  You could take an exacto knife (one of the pointly ended ones) and hit it softly with a chisel to remove the matrix around the crab.

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