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System/
Period
Series/
Epoch
Stage/
Age
Age (Ma)
Cretaceous Lower/
Early
Berriasian younger
Jurassic Upper/
Late
Tithonian 145.0–152.1
Kimmeridgian 152.1–157.3
Oxfordian 157.3–163.5
Mid/
Middle
Callovian 163.5–166.1
Bathonian 166.1–168.3
Bajocian 168.3–170.3
Aalenian 170.3–174.1
Lower/
Early
Toarcian 174.1–182.7
Pliensbachian 182.7–190.8
Sinemurian 190.8–199.3
Hettangian 199.3–201.3
Triassic Upper/
Late
Rhaetian older
Subdivision of the Jurassic system
according to the IUGS, as of July 2012.

The Late Jurassic is the third epoch of the Jurassic period, and it spans the geologic time from 161.2 ± 4.0 to 145.5 ± 4.0 million years ago (Ma), which is preserved in Upper Jurassic strata.[1] In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age. In the past, this name 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[edit]

The Late Jurassic is divided into three ages, which correspond with the three (faunal) stages of Upper Jurassic rock:

  Tithonian (150.8 ± 4.0 – 145.5 ± 4.0 Ma)
  Kimmeridgian (155.7 ± 4.0 – 150.8 ± 4.0 Ma)
  Oxfordian (161.2 ± 4.0 – 155.7 ± 4.0 Ma)

Paleogeography[edit]

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.

Life forms of the epoch[edit]

This epoch is well known for many famous types of dinosaurs, such as the sauropods, the theropods, the thyreophorans, and the ornithopods. Other animals, such as crocodiles and the first birds, appeared in the Jurassic. Listed here are only a few of the many Jurassic animals:

References[edit]

  1. ^ Owen 1987.
Jurassic Period
Lower/Early Jurassic Middle Jurassic Upper/Late Jurassic
Hettangian | Sinemurian
Pliensbachian | Toarcian
Aalenian | Bajocian
Bathonian | Callovian
Oxfordian | Kimmeridgian
Tithonian

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Late_Jurassic — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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757 news items

reportingclimatescience.com

reportingclimatescience.com
Wed, 19 Nov 2014 02:30:00 -0800

Comparison with the Upper Jurassic Lourinhã Formation in Portugal and the Vega Formation in Spain reveals that MAP in Late Jurassic Portuguese environments was similar to that in the wet northern part of the Morrison Formation, although more arid ...
 
Mashable
Mon, 24 Nov 2014 08:41:15 -0800

The dinosaur (Stegosaurus stenops) was an herbivore that lived about 155 million to 150 million years ago, during the late Jurassic Period. Stegosaurus, known for the two rows of bony plates along its back, primarily lived in western North America.
 
Yahoo News
Fri, 21 Nov 2014 05:41:15 -0800

The dinosaur (Stegosaurus stenops) was an herbivore that lived about 155 million to 150 million years ago, during the late Jurassic Period. Stegosaurus, known for the two rows of bony plates along its back, primarily lived in western North America. The ...
 
Glenwood Springs Post Independent
Thu, 20 Nov 2014 08:41:15 -0800

It's “a fresh water fish that was discovered in the Late Jurassic Mygatt-Moore Quarry in Rabbit Valley in 2004 by Andrew Milner,” she explained. The fish was found “in a hard thin layer above the dinosaur bones is the 'fish layer' where fossils like ...
 
Malay Mail Online
Wed, 19 Nov 2014 02:07:30 -0800

NOVEMBER 21 ― The country's archeological team recently discovered the fossil of Iguanodon dinosaur in northern Terengganu. The dinosaur existed from the late Jurassic Period to Cretaceous Period, or about 160 million to 66 million years from now.
 
New Scientist
Wed, 05 Nov 2014 04:11:15 -0800

It was the T. rex of the crocodile world. But even for a creature 9 metres long, chomping through the wet, slippery shells of giant sea turtles isn't easy. Now it seems the Late Jurassic croc Machimosaurus hugii had teeth with a special feature for ...

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Telegraph.co.uk
Fri, 14 Nov 2014 23:03:57 -0800

It would have lived in the late Jurassic period, around 150 million years ago. By the time Tyrannosaurus Rex evolved in the late Cretaceous period, around 68 million years ago, the creature would have already been a fossil. In fact there is less ...

Nature World News

Nature World News
Wed, 05 Nov 2014 15:03:45 -0800

These same grooves also gave the teeth of the Late Jurassic period crocodile a serrated look, like tiny saws. "As serrated teeth increase the efficiency of slicing into prey, our discovery may help us learn when this group of marine crocs shifted from ...
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