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INDEX
P
- Pope Creek Coal Member
- Pope Megagroup
- Porters Creek Formation
- Post Creek Formation
- Potosi Dolomite
- Potsdam Sandstone Megagroup
- Pounds Sandstone Member
- Prairie du Chien Group
- Precambrian Erathem
- Prospect Hill Siltstone
- Proviso Siltstone Member
- Purington Shale Member
Q
R
R cont.
- Ramp Creek Limestone Member
- Rapid Member
- Reel Limestone Member
- Reelsville Limestone Member
- Reisner Limestone Member
- Renault Limestone
- Rendleman Oolite Bed
- Reynoldsburg Coal Member
- Richmondian Stage
- Ridenhower Formation
- Rivoli Member
- Robein Member
- Roby Silt Member
- Rocher Member
- Rock Branch Coal Member
- Rock Island Coal Member
- Romeo Member
R cont.
S