At this outcrop, there is an anticline developed within the Salona-Coburn Format

Question

At this outcrop, there is an anticline developed within the Salona-Coburn Formation. At the northern end of the outcrop si the contact with the Antes shale that marks the end of carbonate depostition. You will be expected to answer the following series of questions.

Please answering the following: (Please answer all parts and asap!!!)

- What is the orogeny that produced this deformation? What constraint do you have to support your position?

- What is the significance of the contact with the Antes Shale? Would you expect this contact to be older or younger at a location 40 kilometers to the southeast? Why?

Explanation / Answer

Taconic orogeny was responsible for this deformation . Taconic was a famous orogeny of Ordovician time which was also responsible for building of alppalachian mountain belts

Antes is recognized throughout northwestern part of the Valley and Ridge province in central PA and under the Appalachian plateau of western PA. Consists primarily of dark-gray to black calcareous shale, which weathers to pale yellowish brown. Homogeneous and very thick bedded with moderate to excellent fissility. Contains a few thin interbeds of calcisiltite in middle and lower parts. Assumed to conformably overlie Coburn Formation. Gradationally underlies Reedsville Formation. Thickness calculated from dip and map-pattern width is 75m. Best exposure in study area is in creek bed just south of the high-voltage power line on the west side of Sinking Valley. Age is Late Ordovician.

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