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Geologic units in Wayne county, Pennsylvania

Poplar Gap and Packerton Members of Catskill Formation, undivided (Devonian) at surface, covers 59 % of this area

Poplar Gap and Packerton Members of Catskill Formation, undivided - Includes, in descending order, the Poplar Gap (Dcpg) and Packerton (Dcp) Members of the Catskill Formation.

Long Run and Walcksville Members of Catskill Formation, undivided (Devonian) at surface, covers 41 % of this area

Long Run and Walcksville Members of Catskill Formation, undivided - Includes, in descending order, the Long Run (Dclr) and Walcksville (Dcw) Members of the Catskill Formation, which are described separately below.

Llewellyn Formation (Pennsylvanian) at surface, covers 0.1 % of this area

Llewellyn Formation - Gray, fine- to coarse-grained sandstone, siltstone, shale, conglomerate, and numerous anthracite coals in repetitive sequences.

Duncannon Member of Catskill Formation (Devonian) at surface, covers < 0.1 % of this area

Duncannon Member of Catskill Formation - Grayish-red sandstone, siltstone, and mudstone in fining-upward cycles; conglomerate occurs at base of some cycles.