Oligocene
Metasequoia sp.
Oligocene
Utah
Dawn Redwood leaves
Rhizothyris curiosa
Oligocene
New Zealand
Brachiopod
Dapalis macrurus
Upper Oligocene
Provence, France
Fish
Helix ledyi
Lower Oligocene
Brule Fm.
South Dakota
Land snail
Hyaenodon sp.
Lower Oligocene
Brule Fm.
South Dakota
Creodont teeth (carnivore)
Metasequoia occidentalis
Lower Miocene / Upper Oligocene
John Day Fm.
Crook Co., Oregon
Dawn Redwood leaves
Betula fairii
Lower Miocene /
Upper Oligocene
John Day Fm.
Crook Co., Oregon
Birch leaf
Hyracodon nebrascensis
Lower Oligocene
Brule Fm.
South Dakota
Running Rhino tooth
Merycoidodon culbertsoni
Lower Oligocene
Brule Fm.
Shannon Co., South Dakota
Oreodont skull (3 views)
(mammal)
Mesohippus bairdi
Lower Oligocene
Brule Fm.
South Dakota
Horse teeth
Ischyromys typus
Lower Oligocene / Upper Eocene
White River Series
South Dakota
Squirrel skull
Xanthopsis vulgaris
Oligocene
Keasey Fm.
Columbia Co., Oregon
Crab