In northeastern Ohio, sandstone bodies assigned to the Lower Silurian Albion Group are western tongues of the continental Tuscarora Sandstone, intertonguing with marine shale. The main (Grimsby) tongue is the driller's 'Clinton' sandstone. Cores and core logs indicate a delta-shelf, transitional environment, wherein hydrocarbons are trapped at 4,000-5,000-ft depths in channel-fill and bar sandstones containing evaporites. Reservoirs are erratically distributed; porosity and permeability are about 12 percent and 2 md, respectively; producible reserves should be less than 60 bbl of oil or 250 Mcf of gas per acre-foot, and net pay probably will not exceed 20 feet.

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