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Showing results for tags 'hoploscaphites cheyennensis'.
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3.5" Hoploscaphites Cheyennensis in a matrix of smaller ammonites (Fox Hill Formation, South Dakota)
xraymike79 posted a topic in Member CollectionsThis is my first matrix of multiple ammonites. Beautiful detail and colors in this one.
xraymike79 posted a topic in Member CollectionsI bought this opalized ammonite last month from a gentleman in Westerly, Rhode Island. Here's where he got it...