File:Mollweide_Paleographic_Map_of_Earth,_170_Ma_(Bajocian_Age).png · Wikimedia Commons · See Wikimedia Commons

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Jurassic

Also known as Jurassic Period, Jurassic System

The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period Ma (million years ago) 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.

AI overview

The Jurassic is a geologic period that lasted from approximately 201 million years ago until 143.1 million years ago, making it the middle period of the Mesozoic Era. It is named after the Jura Mountains, where rocks from this time period were first scientifically identified and studied.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Geologic timespan.upper_gssp_candidates: None
Geologic timespan.color: Jurassic
Geologic timespan.time_start: 201.4
Geologic timespan.time_start_uncertainty: 0.2
Geologic timespan.time_end: 143.1
Geologic timespan.time_end_uncertainty: 0.6
Geologic timespan.image_map: Mollweide Paleographic Map of Earth, 170 Ma (Bajocian Age).png
Geologic timespan.caption_map: A map of Earth as it appeared 170 million years ago during the Middle Jurassic Epoch
Geologic timespan.timeline: Jurassic
Geologic timespan.name_formality: Formal
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Period
Geologic timespan.strat_unit: System
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: First appearance of the ammonite Psiloceras spelae tirolicum.
Geologic timespan.lower_gssp_location: Kuhjoch section, Karwendel mountains, Northern Calcareous Alps, Austria
Geologic timespan.lower_gssp_accept_date: 2010

via Wikipedia infobox

Wikidata facts

Image: Europasaurus holgeri Scene cropped.jpg

Show 5 more facts

Commons category: Jurassic
start time: 201400000-
end time: 145000000-
sRGB color hex triplet: 34B2C9
IPA transcription: /dʒʊˈræsɪk/

Sources (6)

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~77 min read

Article

59 sections

Contents

Etymology and history
Geology
Stratigraphy
Early Jurassic
Middle Jurassic
Late Jurassic
Mineral and hydrocarbon deposits
Impact structures
Paleogeography and tectonics
Climate
Climatic events
Toarcian Oceanic Anoxic Event
End-Jurassic transition
Flora
End-Triassic extinction
Floral composition
Conifers
Ginkgoales
Bennettitales
Cycads
Other seed plants
Ferns and allies
Lower plants
Fauna
Dinosaurs
Theropods
Birds
Ornithischians
Sauropodomorphs
Other reptiles
Crocodylomorphs
Turtles
Lepidosaurs
Choristoderes
Ichthyosaurs
Plesiosaurs
Pterosaurs
Amphibians
Mammaliaformes
Fish
Jawless fish
Sarcopterygii
Actinopterygii
Chondrichthyes
Insects and arachnids
Marine invertebrates
End-Triassic extinction
Marine ecosystems
Echinoderms
Crustaceans
Brachiopods
Bryozoans
Molluscs
Gastropods
Bivalves
Cephalopods
References
Citations
External links

The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province (CAMP). The beginning of the Toarcian Age started around 183 Ma and is marked by the Toarcian Oceanic Anoxic Event, a global episode of oceanic anoxia, ocean acidification, and elevated global temperatures associated with extinctions, likely caused by the eruption of the Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear, definitive boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined.