The Huntley Mountain Formation is a late Devonian and early Mississippian mapped bedrock unit in Pennsylvania, in the United States.
Description
The formation is composed of relatively soft grayish-red shale and olive-gray sandstone. It is located in north central Pennsylvania.
Haystacks The Haystacks are enigmatic mounds of sandstone that outcrop in Loyalsock Creek south of Dushore in Sullivan County. They are a single bed of quartz sandstone with an undulating upper surface with up to one meter relief. The origin of the mounds is debatable.The Haystacks, "Ricketts Folly," and The End of the World: Geology of the Glaciated Allegheny High Plateau, Sullivan, Luzerne, and Columbia Counties, Pennsylvania, 71st Annual Field Conference of Pennsylvania Geologists (field trip guide book), J. D. Inners, G. M. Fleeger, eds., 2006
Notable Exposures The type section of the formation is at Huntley Mountain in Lycoming County, Pennsylvania, on the mountainside just north of the village of Waterville. Base of the Loyalsock Creek gorge in Worlds End State Park Haystacks beds, also in Loyalsock Creek
Stratigraphy Geologist William E. Edmunds argues that the Huntley Mountain Formation is laterally equivalent to the Rockwell Formation (originally described in West Virginia) and the Spechty Kopf Formation. He proposes that the Pocono Formation be reinstated as "the dominantly non-red, non-marine clastic sequence between the Catskill and Mauch Chunk Formations", with the Huntley Mountain, Beckville, Burgoon, Rockwell, Mt. Carbon, and Spechty Kopf Formations demoted to the status of members of the Pocono Formation. Other workers support this interpretation.Lessing, Peter, Dean, S.L., and Kulander, B.R., 1992, Stratigraphy and structure of Meadow Branch synclinorium, West Virginia: Southeastern Geology, v. 32, no. 3, p. 166-174.
See also
Geology of Pennsylvania
References