Fossilized Coal Ferns
The rocky ceiling of a coal mine is ornamented everywhere by exquisite tracery, inimitale representation of the delicate frond of ferns. Remove a scale of rock and we discover an exquisite fossilized fern. Fossil ferns such as this acient tree fern are often found in association with coal seams.
Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)