Here is the info. http://api.ning.com/files/SkUVCJX9yx00p1FWDChAbBrGWt396vLLLSQt6fydLvG8ahNseJWfOYpzGkPmuI9ciUgQFnJX6dAQtQsnQLNRPEfcgWjpQCVrFUvDqsLcgmw_/TuscaloosaMarineShale.pdf