What is the massive anhydrite?

I started looking through old documents in the document images on sonris and found that most of the well drilled in the 70s have a nice list of all the formations they drilled through. I own 80 acres in Ouachita parish and I found that all of the wells around my land have "massive anhydrite" listed at about 3,000ft. I know it probably doesn't have anything to do with O&G but what is a massive anhydrite formation and how is it formed?

On another note. I found several old wells that showed the Haynesville lime formation as far east as East Carroll parish. I thought that was interesting.

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Permalink Reply by Checkmateking on December 9, 2008 at 0:23
The Anhydrite was put there to mess up the drilling mud for people trying to drill a Rodessa well.

LOL
Permalink Reply by The_Baron on December 9, 2008 at 5:33
LOL, i love it....
Permalink Reply by The_Baron on December 9, 2008 at 5:33
It does make pretty core samples though.

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