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GeoRef Subject
Cenozoic
East Africa
Eutheria
Mastodontoidea
Neogene
igneous rocks
Chordata
diatomite
sedimentary rocks
Theria
Ethiopia
Africa
cinerite
Proboscidea
Afar Depression
sediments
Tetrapoda
K/Ar
absolute age
argillite
clastic rocks
sandstone
Tertiary
tuffite
Vertebrata
volcanic rocks
pumice
pyroclastics
Rodentia
upper Miocene
ignimbrite
Miocene
stratigraphy
rhyolites
Mammalia
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