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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.

6728 news items

Irish Examiner

Irish Examiner
Wed, 29 Jul 2015 07:37:30 -0700

That said, they add that if greenhouse gas emissions continue at the current rate, carbon dioxide levels in the atmosphere are expected to match hose of the Late Jurassic by 2100, and then exceed them. For coral, this could lead to death by 'bleaching ...

Huffington Post

Huffington Post
Fri, 17 Jul 2015 14:01:33 -0700

This massive calculation revealed the evolutionary rates across the entire Mesozoic epoch, allowing researchers to see the rapid burst of evolutionary development in the late Jurassic (200 -145 millions years ago). "What our study suggests is that ...

Forbes

Forbes
Tue, 21 Jul 2015 06:18:45 -0700

The results show that in fact there is a distinct, significant peak of morphological evolution during the Early and Middle Jurassic (about 200 to 163 million years ago), slowing down through the Late Jurassic. There are other small peaks of ...
 
Nature World News
Mon, 27 Jul 2015 20:35:16 -0700

By James Sullivan. Jul 27, 2015 11:29 PM EDT. Allosaurs lived 155 to 145 million years ago during the late Jurassic period. Allosaurus skeletons are among those found in the Cleveland Lloyd Dinosaur Quarry, near Price, Utah. (Photo : Wikipedia Commons).

South Wales Evening Post

South Wales Evening Post
Thu, 30 Jul 2015 00:33:24 -0700

HE made his Ospreys debut some time around the late Jurassic period and he retired as a player at the end of last season, but Duncan Jones hasn't yet had his fill of the Liberty Stadium region — far from it. "Hopefully, there will be some further ...

Newbury Weekly News Group

Newbury Weekly News Group
Wed, 29 Jul 2015 22:51:35 -0700

Our award-winning augmented reality image this week is Stegosaurus. The 'roof' or 'covered lizard lived during the late Jurassic period and is best known for its distinctive back plates and spiked tail. Download the newburyi3d app from Google Play or ...

Montana Standard

Montana Standard
Sun, 05 Jul 2015 14:20:59 -0700

The formation dates back 150 million to 160 million years to the late Jurassic age — the time of dinosaurs. Back then, this area of Montana was an inland sea. The Swift formation represents the last “major regression of the Sundance Sea,” Gunderson ...

I4U News

I4U News
Sun, 19 Jul 2015 16:37:30 -0700

At a rate of 13 times faster than average for other mammals, the slow down leaves questions on why the numbers feel so suddenly in the late Jurassic period. “We don't know what instigated this evolutionary burst.” Close's team has a theory, however ...
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