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.
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.
Life forms of the epoch
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 some crocodylomorphs and the first birds, appeared in the Jurassic. Listed here are only a few of the many Jurassic animals:
Plateosaurus, a single-beamed, little herbivorous sauropod dinosaur from Europe
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
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)
Torvosaurus, a large Jurassic carnivore, from North America and Europe
Ceratosaurus, a medium-sized Jurassic carnivore of North America, Europe, and possibly Africa
Owen, Donald E. (March 1987). "Commentary: Usage of Stratigraphic Terminology in Papers, Illustrations, and Talks". Journal of Sedimentary Petrology. 57 (2): 363–372.
Kazlev, M. Alan (2002-06-28). "Late Jurassic — The Malm Epoch: The Acme of the Dinosaurs". Palæos. Retrieved 2014-10-23.
April 08, 2023
late, jurassic, third, epoch, jurassic, period, spans, geologic, time, from, million, years, which, preserved, upper, jurassic, strata, late, upper, jurassic163, preꞒ, nchronology, mesozoictjurassicklate, tearlymiddlelateearly, khettangiansinemurianpliensbachi. The Late Jurassic is the third epoch of the Jurassic Period and it spans the geologic time from 163 5 1 0 to 145 0 0 8 million years ago Ma which is preserved in Upper Jurassic strata 2 Late Upper Jurassic163 5 1 0 145 0 Ma PreꞒ Ꞓ O S D C P T J K Pg NChronology 200 195 190 185 180 175 170 165 160 155 150 145 MesozoicTJurassicKLate TEarlyMiddleLateEarly KHettangianSinemurianPliensbachianToarcianAalenianBajocianBathonianCallovianOxfordianKimmeridgianTithonian Triassic Jurassic extinction eventSubdivision of the Jurassic according to the ICS as of 2022 1 Vertical axis scale millions of years ago EtymologyChronostratigraphic nameUpper JurassicGeochronological nameLate JurassicName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal ICS Time scale s usedICS Time ScaleDefinitionChronological unitEpochStratigraphic unitSeriesTime span formalityFormalLower boundary definitionNot formally definedLower boundary definition candidatesHorizon of the Ammonite Cardioceras redcliffense Lower boundary GSSP candidate section s Redcliff Point Dorset UK Savouron Provence FranceUpper boundary definitionNot formally definedUpper boundary definition candidatesMagnetic base of Chron M18r Base of Calpionellid zone B FAD of Ammonite Berriasella jacobiUpper boundary GSSP candidate section s NoneIn 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 Contents 1 Subdivisions 2 Paleogeography 3 Life forms of the epoch 4 ReferencesSubdivisions EditThe Late Jurassic is divided into three ages which correspond with the three faunal stages of Upper Jurassic rock Tithonian 152 1 0 9 145 0 0 8 Ma Kimmeridgian 157 3 1 0 152 1 0 9 Ma Oxfordian 163 5 1 0 157 3 1 0 Ma Paleogeography EditThis 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 Life forms of the epoch EditThis 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 some crocodylomorphs and the first birds appeared in the Jurassic Listed here are only a few of the many Jurassic animals Plateosaurus a single beamed little herbivorous sauropod dinosaur from Europe 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 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 Torvosaurus a large Jurassic carnivore from North America and Europe Ceratosaurus a medium sized Jurassic carnivore of North America Europe and possibly Africa Compsognathus a small theropod from Europe Yangchuanosaurus a large theropod from Asia Tuojiangosaurus a thyreophoran from Asia Stegosaurus a thyreophoran from North America and Europe Dryosaurus a North American ornithopod Camptosaurus an ornithopod from North America and possibly Europe Gargoyleosaurus a thyreophoran from North America Archaeopteryx the first known bird from Europe Rhamphorhynchus a long tailed pterosaur from Europe Pterodactylus a short tailed pterosaur from Europe Ophthalmosaurus a very common sea going ichthyosaur from Europe and North America Liopleurodon a medium sized sea going pliosaur from Europe Perisphinctes an ammonite Stenopterygius a rare looking sea going ichthyosaur from North America and Eurasia Pelagosuchus from America and AfricaReferences Edit Geology portal Paleontology portal International Chronostratigraphic Chart PDF International Commission on Stratigraphy Owen 1987 Gradstein F M Ogg J G Schmitz M D Ogg G M editors 2012 The Geologic Timescale 2012 volume 1 Elsevier p 744 ISBN 978 0 44 459390 0 a href Template Cite book html title Template Cite book cite book a CS1 maint uses authors parameter link Owen Donald E March 1987 Commentary Usage of Stratigraphic Terminology in Papers Illustrations and Talks Journal of Sedimentary Petrology 57 2 363 372 Kazlev M Alan 2002 06 28 Late Jurassic The Malm Epoch The Acme of the Dinosaurs Palaeos Retrieved 2014 10 23 Retrieved from https en wikipedia org w index php title Late Jurassic amp oldid 1146742800, wikipedia, wiki, book, books, library,
