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This specimen is a piece of fossilized Alamosaurus sanjuanensis bone
Very roughly
Comparative geochemical studies suggest that the waters of Fossil Lake lacked the oxygen needed to sustain scavengers
recovered on private land in South Dakota from the Hell Creek Formation
Orthoceras Pendant - SOLD 2.59" giftsforher This specimen is a pieceOrthoceras was an Ordovician cephalopod with a calcium carbonate shell which provided excellent physical protection against their natural predators. This necklace is a fossilized shell from this animal that has been preserved in great detail. You can even see the individual chambers the nautiloid had in its shell. This pendant is a 2. 59" Orthoceras fossil with a fine sterling silver backing and an 18 inch chain of the same material.
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