Basic geology, especially as it informs the stratigraphic intervals that pertain to the producing formations we touch on in our GHS discussions, may be of interest to some members as they are to me.  I had been looking for a video on Youtube that depicted events that I read about in articles and scholarly papers that touch on the Haynesville formation and other north Louisiana producing formations.  The "opening of the Gulf of Mexico" being one event often mentioned. The video, linked below as 240 million years ago, is compliments of Rock Man. 

The stratigraphic chart, Composite Surface & Subsurface Columnar Section of Louisiana, is one of many accessible online and is chosen because it covers the specific formations/zones that comprise our major primary area producing formations.  Under the System column, look for the Cretaceous and Jurassic sections and then in the Formation/Member column for the individual formations.

Composite Surface & Subsurface Columnar Section of Louisiana



240 million years ago to 250 million years in the future

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