There are another 10 to 15 additional shale oil and gas features found in the US and about 8 big ones in Canada (even adjacent to the Shield). These "plays" have always been known to contain gas and oil.
FOR EXAMPLE, consider The Marcellus fields inNY, Pa, Oh, W Va, Md, and Va. In 1953 through 1955, several field geologists working for the US and Pa surveys mapped the oil and gas "plays" in the Devonian rocks of the state of PA. They wrote in their published volume of 1957:
"Several interesting (geologic, paleontologic and stratigrphic) features are apparent from the study of the (OUR) maps... That is, the deep marine source rocks of the Helderberg through the Tully Formations contain hydrocarbons (This includes the HAmilton rocks that include the MARCELLUS FORMATION) These formations have NOT been evaluated wty their high carbon ratio lines (an early hydrocarbon assessment tool), Though this criterion should enter into their final analysis"
The authors, Jons and CAte, merely were stating that there is a high carbon ratio line within these rocks (Not below and not above) tThis carbon ratio is indicative of a Hydrocarbon "Play' (A word that means either recoverable or non-recoverable petroleum and gas based upon the technology of the day). Since Jones and CAte Weve only begun tapping all these new gas and oil fields (and reworking some older ones like the Bakken and the Green River). All this is just because because of entirely new drilling and exploration technology. Weve been developing micro accurate logging tricks to tell us just how much pwtro the rocks contain and where. The paleo gives is the biological reasons for the deposits and then, on top of it all, A technology for packing-off and liquid shooting formations (Fracking) coupled wih all new slant drilling techniques has opened entirely new petrol fields for development (once thought marginal or non recoverable (like the Marcellus) WE HAVE NOT FOUND ONE JOT OF ABIOTIC OIL OR GAS OUT HERE.
Youve got your little gunga head firmly up your gunga ass again if you
Jones Thomas A. and Addison S CAte (1957). A Preliminary Report on a Regional Stratigraphic Study of DEVONIAN ROCKS of Pennsylvania
.Pa Geol Survey (IV Series). Special Bulletin 8.
In 2005, the P Survey just dumped all the extra copies of these entire series of Stratigraphic reports of the Paleozoic Rocks . I was there to get my free copies and have been offered good bucks to buy the special included maps.
Course, since then, the survey had set up a fund for Penn State to copy nd post all these reports on the P Survey's website so my paper copies are just anoter relic of the past .
BUT , my point was that there was no NEW findings about Abiotic oil in any of these finds. These fields qere known for decades but were just considered un workeable and the hydrocarbons were considered non- recoverable