Question:  The Bowland Shale Formation is a Carboniferous geological formation of Asbian (Visean) to Yeadonian (Bashkirian) age, it is an organic-rich shale which, according to which organization, and is the source rock where "oil and gas matured before migration to conventional fields in the East Midlands and the Irish Sea"?
Sentence (from "Bowland Shale Formation"): It is known from outcrop and subsurface borehole data in the north of England, the Isle of Man, parts of North Wales and the Midlands.
Relevant evidence: No