Geology Description. The Marcellus Formation is a black shale that may contain limestone beds and concentrations of iron pyrite (Fe S 2) and siderite (FeCO 3). Its sedimentary structure, or bedding, is moderately well developed.
§1113A5b. Creation of West ia Future Fund; legislative intent; calculation of deposits from excess severance tax revenues; permissible uses of investment income and limitations on expenditures; definitions.