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Crinoid Chalcedony, v. Chert with Archimedes
Collector: Johnson, Mary
Dimensions:
4.2x 3.1x 2.3
Object number: 2019.3.1962
Descriptionbulf fossiliferous chert from nodule in grey. fossilifecous quarried limestone, nodule zoned 16 / churt / dolomite one impression looks thusly: