The Gehannam Formation (or Gar Gehannam) is a formation in Egypt which dates to the

Eocene The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ...

. It is similar in age to the

Birket Qarun Formation The Birket Qarun Formation is an Eocene aged formation in Egypt. It is part of the famous Wadi al Hitan. Notable fossils include the ancient whales ''Basilosaurus'' and ''Dorudon'' as well as sirenians ''Eotheroides'' and ''Eosiren''. It also con ...

Paleobiota

Mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...
s

Afrotheres

Cetacea

Reptile Reptiles, as commonly defined, are a group of tetrapods with an ectothermic metabolism and Amniotic egg, amniotic development. Living traditional reptiles comprise four Order (biology), orders: Testudines, Crocodilia, Squamata, and Rhynchocepha ...
s

Crocodylomorphs

Fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...

Actinopterygians

Chondrichthyes

References

{{Reflist Geologic formations of Egypt