Late Jurassic

Late/Upper Jurassic
Late/Upper Jurassic
Chronology
←	Triassic–Jurassic extinction event
	Subdivision of the Jurassic according to the ICS, as of 2022.; Vertical axis scale: millions of years ago.;
Etymology
Chronostratigraphic name	Upper Jurassic
Geochronological name	Late Jurassic
Name formality	Formal
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Epoch
Stratigraphic unit	Series
Time span formality	Formal
Lower boundary definition	Not formally defined
Lower boundary definition candidates	Horizon of the Ammonite Cardioceras redcliffense.
Lower boundary GSSP candidate section(s)	Redcliff Point, Dorset, UK; Savouron, Provence, France;
Upper boundary definition	Not formally defined
Upper boundary definition candidates	Magnetic—base of Chron M18r; Base of Calpionellid zone B; FAD of Ammonite Berriasella jacobi;
Upper boundary GSSP candidate section(s)	None

The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.^[2]

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.

^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.
^ Owen 1987.
^ Gradstein, F.M.; Ogg, J.G.; Schmitz, M.D.; Ogg, G.M., eds. (2012). The Geologic Timescale 2012 (volume 1). Elsevier. p. 744. ISBN 978-0-44-459390-0.

[1] "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.

[2] Owen 1987.

[Gradstein_et-al_2012-3] Gradstein, F.M.; Ogg, J.G.; Schmitz, M.D.; Ogg, G.M., eds. (2012). The Geologic Timescale 2012 (volume 1). Elsevier. p. 744. ISBN 978-0-44-459390-0.

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