| Today a group of geology students from Wisconsin explored an abandoned limestone/shale quarry. Here they found several large shark centrums (vertebra) and an excellent Mortoniceras sp. ammonite. Me and Roger Farish (Dallas Paleontological Society) led them into the quarry. Eventually a scientific paper was published in 2015 on the shark centrums. | ||
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| Mortoniceras sp. ammonite |
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The centrums after being in a diluted acetic acid bath. |
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