Tuesday, March 8, 2016

Hyden Formation over Pikeville Formation (Middle Pennsylvanian) Jackson North roadcut, Breathitt County, Kentucky

Hyden Formation over Pikeville Formation (Middle Pennsylvanian; Jackson North roadcut, Breathitt County, Kentucky, USA) 2 
Hyden Formation over Pikeville Formation (Middle Pennsylvanian; Jackson North roadcut, Breathitt County, Kentucky, USA by James St. John


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