The Colefax appears to have no matured species, rather all of the species appearing to be immature. small in many specimens. Then too the limestone appears to one type of an intro-pretential character, i.e., rolled of sea bottom destroying all life. All of the limestones seen today are impure and they are often associated with sandstone while the introduced shales are usually sandy. All of the limestone give way to shale on sandstone to the south and west. The rest of the Penn. section to the east of Bartlesville is as follows: Permian { Breford li Cottonwood li Vera li Forks li. Pennsylvanian Red sands, thin bedded 50 to 75 ft Parkhurst - Topeka, Deer Creek, Grand li, 100 ft. To the north these fan into a thick series of fine- bedded sandstone. Grant li. about two miles long. Then the section seen today, and described above.