This leaf scar pattern exists on a thin 1/16th inch thick lamination of coal on the exterior of this Sigillaria specimen.
Underneath these leaf scars are small dimple structures known as parichnos, and Sigillaria specimens found bearing these structures are assigned to the form genera Syringodendron.
Rock Type: Gray shale
Interval: 5-Block Seam
Age: Middle Pennsylvanian Period, approx. 303 million years.
Location: Lincoln County, West Virginia; Tiny Creek Mine #1, located about 12 miles south of Charleston, West Virginia in the vicinity of Pine Grove.