What are minerals in Louisiana?

As rig counts drop, and oil and gas land and legal work related to the Barnett Shale slow in these tough economic times, some oil and gas professionals in North Texas may be looking to the Barnett Shale's younger sibling to the east, the Haynesville Shale. Though geologically speaking the Haynesville Shale is much older than the Barnett, it is currently experiencing a growth period similar to that of North Texas these last few years, offering new opportunities for legal and land professionals.
However, the Haynesville Shale differs from the Barnett in several important aspects. Unlike the Barnett, much of the area covered by the Haynesville Shale is rural, with the exception of the Shreveport/Bossier metropolitan area. The much deeper Haynesville Shale also covers areas in eastern Texas and northwestern Louisiana that have been open to oil and gas exploration and production going back to the foundations of the industry in those states, much of which still produces, such as the Cotton Valley formation.
As opposed to the Barnett Shale, which lies between 6,000 and 7,000 feet below the surface, the Haynesville Shale lies approximately 12,000 feet below the surface and almost directly beneath the Cotton Valley formation. Although operators with land held by production in these areas are at a great advantage to newcomers in the area, great portions of the Haynesville Shale lie beneath Louisiana, and those accustomed to Texas law and the Barnett Shale should familiarize themselves with Louisiana law regarding oil and gas interests, much of which is codified in the Louisiana Mineral Code, Title 31 of the Louisiana Revised Statutes.