−200 —
–
−195 —
–
−190 —
–
−185 —
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−180 —
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−175 —
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−170 —
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−165 —
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−160 —
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−155 —
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−150 —
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−145 —
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Lower boundary GSSP candidate section(s)
Upper boundary definition Not formally defined Upper boundary definition candidates
Upper boundary GSSP candidate section(s) None
The Late Jurassic is the third
In European lithostratigraphy , the name "Malm " indicates rocks of Late Jurassic age.[3] In the past, Malm was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units.
Subdivisions
The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock:[citation needed ]
Paleogeography
This section
needs expansion . You can help by
adding to it .
(May 2008 )
During the Late Jurassic Epoch, Pangaea broke up into two supercontinents , Laurasia to the north, and Gondwana to the south. The result of this break-up was the spawning of the Atlantic Ocean . However, at this time, the Atlantic Ocean was relatively narrow.[citation needed ]
Life forms of the epoch
This epoch is well known for many famous types of
crocodylomorphs and the first
birds , appeared in the Jurassic. Listed here are only a few of the many Jurassic animals:
Camarasaurus , a large herbivorous sauropod dinosaur from North America
Apatosaurus , a large herbivorous sauropod dinosaur from North America
Brachiosaurus , a large herbivorous sauropod dinosaur from North America
Brontosaurus , a large herbivorous sauropod dinosaur from North America
Diplodocus , a large herbivorous sauropod dinosaur from North America
Barosaurus , a large herbivorous sauropod dinosaur from North America
Europasaurus , a small herbivorous sauropod dinosaur from Europe
Brachytrachelopan , a small herbivorous sauropod dinosaur from South America
Supersaurus , possibly the largest North American sauropod of them all
Dicraeosaurus , a large herbivorous sauropod dinosaur from Africa
Giraffatitan , another large sauropod from Africa (usually recognized as a species of Brachiosaurus )
Allosaurus , possibly the biggest Jurassic predator, the most common Late Jurassic theropod of North America, also present in Europe
Epanterias , one of the largest Jurassic carnivores from North America (possibly just Allosaurus )
Saurophaganax , one of the largest Jurassic carnivores from North America (possibly a synonym of Allosaurus )
Yangchuanosaurus , a large theropod from Asia
Torvosaurus , a large Jurassic carnivore, from North America and Europe
Ceratosaurus , a medium-sized Jurassic carnivore from North America, Europe, and possibly Africa
Elaphrosaurus , a medium-sized Jurassic carnivore from Africa
Ornitholestes , a small theropod from North America
Compsognathus , a small theropod from Europe
Tuojiangosaurus , a thyreophoran from Asia
Stegosaurus , a thyreophoran from North America and Europe
Kentrosaurus , a thyreophoran from Africa
Gargoyleosaurus , a thyreophoran from North America
Dryosaurus , a North American ornithopod
Camptosaurus , an ornithopod from North America and possibly Europe
Yinlong , an early marginocephalian dinosaur from Asia
Chaoyangsaurus , an early marginocephalian dinosaur from Asia
Juramaia , a basal mammal from Asia
Archaeopteryx , the first known bird, from Europe
from Europe
Pterodactylus , a short-tailed pterosaur from Europe
Anurognathus , one of the smallest pterosaurs from Europe
ichthyosaur
from Europe and North America
pliosaur
from Europe
Dakosaurus , a medium-sized sea-going crocodylomorph from Europe
ammonite
[citation needed ]
References