Is a formation (1 of 8) of the Marmaton group in southeastern KS. Divided into the following members (ascending order): Anna shale (new), Myrick Station limestone, Mine Creek shale (new), and Laberdie limestone (new) members. Type exposure designated as the exposure along State Hwy 7, slightly north of the center of sec 7, T27S, R24E, Bourbon Co, KS in the Cherokee basin. Measured section at this type exposure shows the following thicknesses: Anna shale member, 1.8 ft; Myrick Station limestone member, 1.5+/-ft; Mine Creek shale member, .25 ft; and Laberdie limestone member, 25+/-ft. Other measured sections. Overlies Labette shale and underlies Bandera shale, both of the Marmaton group. Cross section. Of Pennsylvanian, Des Moines age.

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