Transcript

Figure 27-1 North American Land Mammal Ages

Geologic Time Scale

North American Land-Mammal Age

Ceno

zoic

Quaternary Pleistocene Rancholabrean Irvingtonian

Tert

iary

Neo

gene

Pliocene Blancan

Miocene

Hemphillian (extends into Pliocene)

Clarendonian Barstovian Hemingfordian

Pale

ogen

e

Oligocene

Arikareean (extends into Miocene)

Whitneyan Orellan

Eocene

Chadronian Duchesnean Uintan Bridgerian Wasatchian

(may extend into Paleocene)

Paleocene Clarkforkian Tiffanian Puercan

Gra

phic

s...B

DCP

EIR

/EIS

(1-3

1-12

) TM

SOURCE: Society of Vertebrate Paleontology 2012 (http://www.ucmp.berkeley.edu/people/pah/nalma.html)


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