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concretion - cannonball concretion from the lower sandstone member of the Monterey Formation - hand specimen
$ 7.50
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concretion - cannonball concretion from the lower sandstone member of the Monterey Formation - hand/display specimen
$ 9.50
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concretion - cannonball concretion from the lower sandstone member of the Monterey Formation - large display specimen
$ 30.00
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limestone - student specimens of a tan to gray silty limestone from the Jurassic Carmel Formation of Utah - Unit of 5 specimens
$ 4.20
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mudcracks in siltstone from the Timpoweap Member of the Moenkopi Formation
$ 20.00
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porcelanite - formed from the reprecipitation of silica during the conversion of siliceous sediments to sedimentary rock - Monterey Formation, CA - display specimen
$ 9.50
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