Type
Age
Age range
320–318.8 Ma
Pennsylvanian
Bashkirian
Langsettian
Yeadonian
Marsdenian
320.1320.0319.9319.9319.9319.8319.8319.7319.6319.6319.6319.5319.4319.4319.4319.3319.3319.2319.1319.1319.1319.0318.9318.9318.9318.8318.8