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Upper Cretaceous of the United States
click on the circles to see its foraminifera
Coon Creek Member of Ripley Formation, Blue Springs MS Prairie Bluff Chalk, Starkville MS Eagle Ford Group, Britton FM, Dallas TX Peedee Formation, New Brunswick NC
as the Late Cretaceous spans over 35 Ma years the map is generalized
to all foraminifera of the Upper Cretaceous of the USA

Stratigraphical Chart of the Upper Cretaceous of the United States
click on the coloured areas to see its foraminifera
Prairie Bluff Chalk, Starkville MS Coon Creek Member of Ripley Formation, Blue Springs MS Eagle Ford Group, Britton FM, Dallas TX Peedee Formation, New Brunswick NC

Chart redrawn after Fig. 3 in Ernest A. Mancini, Jamal Obid, Marcello Badali, Kaiyu Liu and William C. Parcell, 2008:
Sequence-stratigraphic analysis of Jurassic and Cretaceous strata and petroleum exploration
in the central and eastern Gulf coastal plain, United States