Toarcian

E199528
chronostratigraphic stage geologic age

The Toarcian is a stage of the Early Jurassic period characterized by significant marine life diversification and notable oceanic anoxic events.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (3)

Label Occurrences
Toarcian canonical 4
Lower Toarcian 1
Upper Toarcian 1

Statements (49)

Predicate Object
instanceOf chronostratigraphic stage ⓘ
geologic age ⓘ
associatedWith Karoo-Ferrar large igneous province activity ⓘ
Toarcian Oceanic Anoxic Event ⓘ
climatic warming episode ⓘ
enhanced burial of organic carbon ⓘ
increased volcanism ⓘ
sea-level fluctuations ⓘ
baseDefinedBy first appearance of ammonite Dactylioceras (Eodactylites) simplex ⓘ
characterizedBy changes in marine plankton communities ⓘ
faunal turnovers in ammonites ⓘ
faunal turnovers in marine reptiles ⓘ
global carbon cycle perturbation ⓘ
major oceanic anoxic event ⓘ
marine extinctions ⓘ
pronounced negative carbon isotope excursion ⓘ
significant marine life diversification ⓘ
widespread organic-rich black shales ⓘ
definedBy Global Boundary Stratotype Section and Point for base at Peniche, Portugal ⓘ
follows Pliensbachian ⓘ
hasTypicalFossils ammonites ⓘ
belemnites ⓘ
bivalves ⓘ
foraminifera ⓘ
marine reptiles ⓘ
hasTypicalLithology black shales ⓘ
limestones ⓘ
marls ⓘ
locatedInTimeScale Jurassic Period ⓘ
Mesozoic Era ⓘ
namedAfter Thouars ⓘ
Toarcis (Latin name of Thouars) ⓘ
partOf Early Jurassic ⓘ
Early Jurassic ⓘ
surface form: Lower Jurassic Series
precedes Aalenian ⓘ
rank stage ⓘ
recognizedIn Asia ⓘ
Europe ⓘ
North Africa ⓘ
North America ⓘ
South America ⓘ
subdividesInto Toarcian self-linksurface differs ⓘ
surface form: Lower Toarcian

Middle Toarcian ⓘ
Toarcian self-linksurface differs ⓘ
surface form: Upper Toarcian
timeEnd approximately 174.1 million years ago ⓘ
timeStart approximately 182.7 million years ago ⓘ
topDefinedBy first appearance of ammonite Leioceras opalinum ⓘ
usedIn biostratigraphy ⓘ
chemostratigraphy ⓘ

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

Early Jurassic → contains → Toarcian ⓘ
Early Jurassic → lastStage → Toarcian ⓘ
Pliensbachian → precedes → Toarcian ⓘ
Toarcian Oceanic Anoxic Event → geologicalAge → Toarcian ⓘ
Toarcian → subdividesInto → Toarcian self-linksurface differs ⓘ
this entity surface form: Lower Toarcian
Toarcian → subdividesInto → Toarcian self-linksurface differs ⓘ
this entity surface form: Upper Toarcian