Narrower Terms (26)

• Big Sandy Formation (Ariz.)
• Bluewater Bay Formation (South Africa)
• Camp Rice Formation (N.M.)
• Capistrano Formation (Calif.)
• Chalk Hills Formation (Idaho)
• Chowan River Formation (N.C. and Va.)
• De Hoopvlei Formation (South Africa)
• Gila Conglomerate (Ariz. and N.M.)
• Glenns Ferry Formation (Idaho)
• Gubik Formation (Alaska)
• Hatrurim Formation (Israel)
• Hawthorn Formation
• Kinkelbos Formation (South Africa)
• Milagro Formation (Venezuela)
• Monterey Formation (Calif.)
• Nanaga Formation (South Africa)
• Ogallala Formation
• Omo Group (Ethiopia and Kenya)
• Pliocene-Pleistocene boundary
• Quinault Formation (Wash. and Or.)
• Ringold Formation (Wash. and Or.)
• San Diego Formation (Calif. and Mexico)
• Shungura Formation
• Sisquoc Formation (Calif.)
• Wankoe Formation (South Africa)
• Yorktown Formation