Several Pennsylvanian informal members and sandstone lentils are introduced in this report. Tradewater Formation in the Goreville quad. is subdivided into two informal mapping units, the lower Tradewater and the upper. The top of the lower Tradewater is mapped as the top of the Murray Bluff Sandstone Member (a correlative of the Bernadotte Sandstone Member of Willman, 1975). The remainder of the lower Tradewater is subdivided into the ascending informal Ferne Clyffe member, Cedar Creek sandstone lentil, and Lake of Egypt member. The Reynoldsburg Coal Bed is near the base of the Ferne Clyffe, while the informal Bethlehem sandstone lentil occupies the approximate middle of the upper Tradewater. Lake of Egypt member contains mostly silty, medium gray, dark gray, or dark olive-gray shale, siltstone, and claystone. Contains as many as three discontinuous coals. Member is 20 to 60 ft thick in the Goreville quad.

Source: GNU records (USGS DDS-6; Reston GNULEX).