The Utica Shale/Point Pleasant units are getting special attention.
Historically, Utica Shale/Point Pleasant intervals have been considered likely source units for hydrocarbons produced from Trenton and Black River reservoirs.
The Point Pleasant deposition occurred at the end of the Middle Ordovician and was followed by Utica Shale deposition during the beginning of the Upper Ordovician as part of the Cincinnati Group. Deposition of these sediments occurred between 465 and 455 million years ago.
The Point Pleasant formation consists of in-terbedded limestones and calcareous shales and black shales that were deposited in the Utica Shale/Point Pleasant sub-basin of the Central Appalachian Basin located between the Lexington and Trenton platforms. Deposition of the Utica Shale was more extensive than the deposition of the Point Pleasant formation and consists of organic-rich shales. These units were deposited in a low-energy environment with restricted circulation resulting in organic rich sedimentation of source/ reservoir rocks.