Thomas W. Henry, Mackenzie Jr. Gordon, S.P. Schweinfurth & W.H. Gillespie:

  ABSTRACT-The Bangor Limestone, Franklin County, Alabama, contains conodonts, smaller cal-
  careous foraminifers, and a sparse marine macrofauna dating it as late or latest Chesterian (Late
  Mississippian).  In the same area, the Parkwood Formation, a paralic sequence disconformably
  overlying the Bangor, has yielded a fauna containing the reticuloceratid ammonoid Bilinguites
  eliasi Manger and Saunders, previously known only from the Golf Course Formation, Ardmore
  Basin, southern Oklahoma.  This species permits correlation of the Pukwood Formation in north-
  westem Alabama to the upper part of the Prairie Grove Member of the Hale Formation in the
  type Morrowan sequence.  The macrofauna, particularly the brachiopods occurring with the am-
  monoid, supports this correlation.  Bilinguites elisi also allows correlation with the lower part of
  the Yeadonian Stage (lowest Namurian "C") of Europe.  Florules collected just below und above
  the goniatite occurrence in Franklin County correlate with those in the lower two-thirds of the
  New River Formation, southern West Virginia, and with the upper Namurian of western Europe.