Replies to This Discussion

Permalink Reply by Joseph-Ohio on October 20, 2013 at 3:18am

What follows is what occurred to me after looking at the information for awhile (please offer your comments / opinions should you find it possible to shed light on these things) :

Looking at the Precambrian isobars shown on the map and reading them as the top of the contour of that Strata; I'm interpreting that the top of it lies about 6500' below the surface (in the near geography of our land within Ashtabula County).

I've also read elsewhere on these pages that the top of the Utica Point Pleasant Interval (once again in the near geography of our land in Ashtabula County) lies about 5,000' to 5,500' below the surface and is supposed to be about 300' to 350' thick.

I've also seen a 'Stratigraphic Column' type of diagram  that shows (from highest to lowest) the Upper Ordovician containing the Queenston Interval and the Cincinnati Group Interval.  The diagram then shows the Middle Ordovician Strata (below the Upper Ordovician) which contains the Utica / Point Pleasant (at it's shallowest depth) with the Trenton Interval just below it and the Black River Interval below the Trenton with the Gull River Interval shown below the Black River.  Lower, the diagram shows the Lower Ordovician Strata which contains the Wells Creek Interval at it's top and the Beekmantown Interval below it. The diagram then shows the Upper Cambrian Strata containing the Rose Run Interval with the Copper Ridge Interval just below it.

That would seem to put the Precambrian Strata (the subject of this discussion) below the Rose Run and Copper Ridge Intervals (once again shown in the Upper Cambrian Strata).  The Stratigraphic Column Diagram that I'm getting all of this information from and this latest Precambrian Map seems to imply to me that all of the Intervals discussed above (Copper Ridge as lowest and Utica Point Pleasant highest) if present, reside within a Strata Column Thickness of 1000'. 

Seems to me that's a good thing and to coin a phrase another used on these pages is representative of a 'Stacked Play'.  Also, I've read / heard good reports about the Queenston Interval which is the highest Interval shown on the Stratigraphic Diagram I'm trying to interpret and discussing here (once again part of the Upper Ordovician Strata shown above the Cincinnati Group Interval which is shown above the Utica Point Pleasant).

What do you folks think ?  Would like to read how others would interpret all of this insofar as it relates to Shale Gas and Shale Oil development.

Anybody care to advise / comment ? 

Permalink Reply by Joseph-Ohio on October 20, 2013 at 11:49am

Also and BTW; when viewing the updated ODNR map I'm not seeing any Precambrian Strata Ashtabula County 'Faults' indicated (other than those shown near the City of Ashtabula). Thinking that's good news for us as far as 'earthquakes' are concerned.