"From 310 to 345 million years ago" . . . . . . . . . . . "The Mississippian Loyalhanna Limestone (Formation) a Paleozoic eolianite in the Appalachian Basin, in--Cecil, C.B., ed., Predictive stratigraphic analyses guidebook series no. 1--The Mississippian and Pennsylvanian systems in West Virginia"@en . . . . . . . "The Mississippian Loyalhanna Limestone (Formation) : a Paleozoic eolianite in the Appalachian basin, in--Cecil, C.B., ed., Predictive stratigraphic analyses guidebook series no. 1--The Mississippian and Pennsylvanian systems in West Virginia"@en . . . "Loyalhanna Limestone." . .