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Proms and Dactylioceras

To the left a large Promicroceras (25mm).  Top right a group of Promicroceras in yellowstone.  The largest two ammonites are 15mm, several smaller specimens. One of the smaller ones has a smooth shell and is probably Cymbites.  Finally a Dactylioceras nodule.  A chip on one side exposes a small section of ammonite and caused a bit of damage.  Other side is complete, not sure if it will be one that prepares well

Moderate Difficulty

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