Period J

Jurassic

201.4000 – 143.1000 Ma

The Jurassic is a geologic period and stratigraphic system that lasted about 58.3 million years, spanning from the end of the Triassic Period 201.4 Ma to the beginning of the Cretaceous Period, 143.1 Ma. The Jurassic constitutes the second and middle period of the Mesozoic Era as well as the eighth period of the Phanerozoic Eon and is named after the Jura Mountains, where limestone strata from the period were first identified.

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Jurassic
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© Scotese, Christopher R.; Vérard, Christian; Burgener, Landon; Elling, Reece P.; Kocsis, Ádám T. · CC BY 4.0
Fossil genera 558
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News 13
Episode 170: Cariocecus bocagei
The iguanodontians were an incredibly successful group within the Cretaceous. They could reach incredible sizes, with the largest species even matching the proportions of some sauropods, and they also had an incredible palaeogeographic range, meaning that their remains are found all over the world today. In the late Jurassic, they were a lot less diverse [&hellip
15/09/2025 palaeocast
Ceratosaurus: Beast of the Week
Ceratosaurus: Beast of the Week
This week we shall be looking at a popular meat-eater with some truly unique features.  Enter Ceratosaurus!Watercolor life reconstruction of Ceratosaurus nascornis eating the ancient lungfish, Ceratodus robustus by Christopher DiPiazza. Ceratosaurus was a meat-eating dinosaur that lived during the late Jurassic period, about 150 million years ago, in what is now the United States, specifically Utah and Colorado.  Bones thought to be from Ceratosaurus have also been unearthed in Portugal.  As an
14/07/2025 prehistoricbeastoftheweek
Lepidotes: Beast of the Week
Lepidotes: Beast of the Week
 This wee we will look at a unique kind of prehistoric fish that swam in rivers and lakes while some of the largest dinosaurs walked on land.  Check out Lepidotes!Watercolor reconstruction of Lepidotes gigas by Christopher DiPiazza.Lepidotes was a genus of heavily scaled bony fish that lived in what is now Europe and North America during the early Jurassic between 180 and 175 million years ago.  The genus may have even persisted into the Early Cretaceous, as recent as 115 million years ago, but
29/06/2025 prehistoricbeastoftheweek
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Parent interval
Mesozoic Era
Sub-intervals 3
Early Jurassic
201.4000 – 174.7000
Middle Jurassic
174.7000 – 161.5000
Late Jurassic
161.5000 – 143.1000