A resident of the Chelyabinsk region put up for sale an unusual fossil with the remains of ancient shells, chelTV reports.
According to the seller, there are several fossilized ancient spiral shells on the stone, but he was unable to pinpoint all the details. The man believes that his find may date back to the ancient period when the territory of present-day Western Siberia was flooded with water. According to the hypotheses of scientists, at that time there was a lake-sea on this territory, which was formed about 40 thousand years ago and disappeared after ten thousand years. There are also versions about an older strait separating Europe and Asia which is at least 160 million years old.