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Madagascar ammonite crushing?


IonRocks

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Can someone tell me about the crushing that is seen in the walls of this ammonites chambers? Its odd to me that in the areas where the entire wall is gone, the geode/vug areas still occur as you would expect them to with chambers? 

I picked this up for $10 after noticing the crushing, because I don't have any like that in my collection

IMG_5758.JPG

IMG_5759.JPG

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I believe the infill of sand that fills these cavities and lithifies is what causes the crushing of the walls.

 

 

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