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The crystallized buffalo bone specimens found in Alberta, including Drumheller, are often associated with the remains of ancient bison from the Pleistocene era. The Pleistocene epoch spanned from about 2.6 million years ago to around 11,700 years ago. Fossils and bones from this time can vary in age within that broad timeframe.

The crystallization process can occur over thousands to hundreds of thousands of years, depending on the environmental conditions and the minerals present in the surrounding soil or rock. Therefore, while the buffalo bone specimens themselves are likely from the Pleistocene era, the specific age of the crystallization of these bones can be challenging to determine precisely without detailed geological analysis.