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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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49 news items

National Geographic

National Geographic
Mon, 29 Sep 2014 17:49:48 -0700

What's odd is that Alligatorellus weren't the only cute little crocs running around in Late Jurassic Europe. The same deposits have yielded other, closely-related animals named Atoposaurus and Alligatorium. Stranger still, the species of Atoposaurus ...

Discovery News

Discovery News
Thu, 25 Sep 2014 11:45:00 -0700

Modern birds evolved gradually from their dinosaur ancestors, before diversifying into the thousands of species known today. Steve Brusatte/University of Edinburgh. Gallery. World'sOldestKnownBird:Photos. View Caption +. The skeletal remains of ...

International Business Times UK

International Business Times UK
Wed, 17 Sep 2014 07:47:09 -0700

Others have suggested the skull could have belonged to a creature called Dakosaurus-maximus, a prehistoric carnivore within the family Metriorhynchidae that lived during the Late Jurassic and Early Cretaceous eras. However, Dr Mark Evans, curator of ...

Leicester Mercury

Leicester Mercury
Wed, 17 Sep 2014 05:07:36 -0700

Dr Evans said: “It was a marine crocodile which lived during the Late Jurassic - about 145 to 155 million years ago. “This fits the suggested age of the 'skull', but I don't know what the basis for this is, not being familiar with Siberian geology ...

Tech Times

Tech Times
Fri, 26 Sep 2014 06:14:36 -0700

New discoveries made over the past two decades, for instance, revealed that dinosaurs already evolved avian traits as soon as they emerged about 230 million years ago, long before the Archaeopteryx lived during the Late Jurassic period. For the new ...
 
LiveScience.com
Tue, 16 Sep 2014 03:41:15 -0700

A group of scientists reports they found traces of scavenging on the bones from a fossilized "ichthyosaur fall" of the Late Jurassic Period. This 10-foot-long (3 meters) specimen was discovered during the construction of a road in 1991 in Dorset, England.
 
Moab Times Independent
Thu, 11 Sep 2014 08:56:15 -0700

While footprints of other three-toed sauropods are a familiar sight around Moab, there are no obvious signs that the creature known as Dystrophaeus once roamed the area during the Late Jurassic Era. But famed geologist and paleontologist John Strong ...
 
Discovery News
Wed, 10 Sep 2014 14:00:00 -0700

... from childhood toys and films like Jurassic Park, many dinosaurs in fact more closely resembled birds, kind of like this recently discovered little guy, Eosinopteryx brevipenna, a flightless theropod dinosaur that roamed China during the Middle ...
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