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Jurassic Period
201.3–145 million years aby
Mean atmospheric O
2
content ower period duration
c. 26 vol %
(130 % o modren level)
Mean atmospheric CO
2
content ower period duration
c. 1950 ppm
(7 times pre-industrial level)
Mean surface temperatur ower period duration c. 16.5 °C
(3 °C abuin modren level)
Key events in the Jurassic
-205 —
-200 —
-195 —
-190 —
-185 —
-180 —
-175 —
-170 —
-165 —
-160 —
-155 —
-150 —
-145 —
An approximate timescale of key Jurassic events.
Vertical axis: millions of years ago.

The Jurassic (frae Jura Moontains) is a geologic period an seestem that accordin tae current scienteefic consensus, spans 56.3 million years frae the end o the Triassic Period 201.3 million years ago (Mya) tae the beginnin o the Cretaceous Period 145 Mya.[note 1]

NotesEedit

  1. A 140 Ma age for the Jurassic-Cretaceous instead o the uisually acceptit 145 Ma wis proponed in 2014 based on a stratigrafic study o Vaca Muerta Formation in Neuquén Basin, Argentinae.[1] Víctor Ramos, ane o the authors o the study proponin the 140 Ma boondary age, sees the study as a "first step" taewart formally chyngin the age in the Internaitional Union o Geological Sciences.[2]

ReferencesEedit

  1. Vennari, Verónica V.; Lescano, Marina; Naipauer, Maximiliano; Aguirre-Urreta, Beatriz; Concheyro, Andrea; Schaltegger, Urs; Armstrong, Richard; Pimentel, Marcio; Ramos, Victor A. (2014). "New constraints on the Jurassic–Cretaceous boundary in the High Andes using high-precision U–Pb data". Gondwana Research. 26: 374–385. doi:10.1016/j.gr.2013.07.005. Retrieved 16 January 2016. 
  2. Jaramillo, Jessica. "Entrevista al Dr. Víctor Alberto Ramos, Premio México Ciencia y Tecnología 2013" (in Spanish). Si logramos publicar esos nuevos resultados, sería el primer paso para cambiar formalmente la edad del Jurásico-Cretácico. A partir de ahí, la Unión Internacional de la Ciencias Geológicas y la Comisión Internacional de Estratigrafía certificaría o no, depende de los resultados, ese cambio.