These are fun to find because they often occur well preserved and in complete whorls. This is because they were attached obliquely to the main stem in life and the whorls easily laid flat as they fell to the swamp floor and were buried by sediments.
These specimens were collected in 1993 .
Rock Type: Sandy shale
Interval: Coalburg seam
Age: Middle Pennsylvanian Period, approx. 307 million years.
Location: Nicholas County, West Virginia; Ramp Run Surface Mine #1, located about 12 miles north of Summersville, West Virginia. Turn west off route 19 north of Summersville onto Spruce Run Road. Follow it about 7 miles.