This specimen shows the ovalate leaf scar pattern davreuxi underneath and in transition with the rugose or "ropey" bark pattern of sigillaria. The rugose pattern is characteristic of the basal portion of the sigillaria trunk, while davreuxi is characteristic of the younger or upper portion of the tree.
Rock Type: Sandy shale
Interval: Coalburg seam
Age: Middle Pennsylvanian Period, approx. 307 million years.
Location: Nicholas County, West Virginia; G&W Surface Mine, located
about 10 miles north of Summersville, West Virginia, just east of Route
19. It is reclaimed now, but fossils can still befound in the rock drainage
channels visible from the highway.