The Fossilised Tree stump
The fossilised stump was one of the giant club mosses which flourished some 300 million years ago when Sheffield lay beneath a shallow sea. When the tree died it was covered by other plants and the sea rose over it. Over time it rotted away and the hole was filled with sand which eventually became a fossil.
The fossil was found in the Chapeltown area by a party of railway navvies in 1875. In the early 1980s it was moved from High Hazels Park to the Botanical Gardens.
Other plants would have formed coal and seams of this can be found near the tree in the gardens.