Here is a list of terms and concepts relating to the Cretaceous and Cenozoic stratigraphy of North Amreica. Please feel free to use this list as a study guide.

Cenozoic- Charles Lyell 1833; based on % of living molluscs

Lyell's names	modern names	% modern or living species
Recent	Holocene	extant
Newer Pliocene	Pleistocene	90%
Older Pliocene	Pliocene	33-50%
Miocene	Miocene	18%
Eocene	Eocene	3.5%

Plio-Pleistocene Mounds Gravel & Grover Gravel & "Lafayette Gravel"

Wilcox Fm is ancient delta at head Miss. Embayment part of Embayment Megagroup

Oligocene; no Oligocene rx in Ill.

Paleocene rocks in Ill. part of Embayment Megagroup (2 fms.) Porters Creek Fm., Clayton Fm. in South both in Midway Group

mammals are now chief correlation fossils in Cenozoic

the term Paleocene is not used in some older literature, so be careful

Cretaceous - Alcide d'Orbigny 1840-1855 subdivided K based on

in Ill is found in South & west in Embayment Megagroup,, all in Gulfian Series; Gulf Coast Plain; 2 different source areas, during K a strux high ran SW-NE in central Ill.

Little Bear Soil - geosols; only named pre-Quaternary soil in Ill.

Tuscaloosa Fm.; transgressive unit

McNairy Fm.

Owl Creek Fm

Baylis Fm

Embayment Megagroup

inlier & outlier