List of Global Boundary Stratotype Sections and Points
Jurassic

List of Global Boundary Stratotype Sections and Points

Section Title: Jurassic
Table Section Text: None

Epoch	Stage	Age (mya)	Status	GSSP location	Defining markers	Geographic Coordinates	References

Upper

Tithonian	152.1	Candidate sections: Mt. Crussol, France Canjuers, France Fornazzo, Sicily	Magnetic: Base of magnetic polarity chronozone M22An. Biologic: Near first appearance of Hybonoticeras hybonotum (Ammonite).

Kimmeridgian	157.3	Candidate section: Flodigarry, Skye, Scotland	Biologic: First appearance of Pictonia baylei (Ammonite).	57°36′00″N 6°12′00″W / 57.6000°N 6.2000°W

Oxfordian	163.5	Candidate sections: Redcliff Point, Dorset, England Savouron, Provence, France	Biologic: Horizon of Cardioceras redcliffense (Ammonite).

Middle

Callovian	166.1	Candidate sections: Pfeffingen, Swabian Alb, Germany Russia	Biologic: First appearance of genus Kepplerites (Ammonite).

Bathonian	168.3	-	Ravin du Bès, Bas-Auran, Alpes de Haute, France	Biologic: First appearance of Gonolkites convergen (Ammonite).	43°57′38″N 6°18′55″E / 43.9606°N 6.3153°E

Bajocian	170.3	-	Cabo Mondego, Portugal	Biologic: First appearance of Hyperlioceras mundum, Hyperlioceras furcatum, Braunsina aspera, and Braunsina elegantula(Ammonite) Biologic: First appearance of genus Hyperlioceras (Ammonite).	40°11′57″N 8°54′15″W / 40.1992°N 8.9042°W

Aalenian	174.1	-	Fuentelsaz, Spain	Biologic: First appearance of Leioceras opalinum and Leioceras lineatum Biologic: First appearance of genus Leioceras (Ammonite).	41°10′15″N 1°50′00″W / 41.1708°N 1.8333°W

Lower

Toarcian	182.7	Peniche, Portugal	Biologic: Near first appearance of Eodactylites fauna (Ammonite). Biologic: Coincides with Protogrammoceras paltus horizon of NW-Europe.

Pliensbachian	190.8	-	Robin Hood's Bay, Yorkshire, England	Biologic: First appearance of Bifericeras donovani and genera Apoderoceras (Ammonite).	54°24′25″N 0°29′51″W / 54.4069°N 0.4975°W

Sinemurian	199.3	-	East Quantoxhead, West Somerset, England	Biologic: First appearance of the Vermiceras quantoxense, Vermiceras palmeri (Ammonite).	51°11′27″N 3°14′11″W / 51.1909°N 3.2364°W

Hettangian	201.3	-	Kuhjoch section, Karwendel mountains, Northern Calcareous Alps, Austria	Biologic: Near first appearance of smooth Psiloceras spela group (Ammonite).	47°29′02″N 11°31′50″E / 47.4839°N 11.5306°E

Sentence(s)

Global Boundary Stratotype Sections and Points has the First Appearance of Apoderocerasas and of Bifericeras donovani the defining biological marker of the Pliensbachian Stage of the Jurassic, 190.8 years.

final_sentence: Global Boundary Stratotype Sections and Points has the First Appearance of Apoderocerasas and of Bifericeras donovani the defining biological marker of the Pliensbachian Stage of the Jurassic, 190.8 years.