Coniacian

The Coniacian is an age or stage in the geologic timescale.

This is followed by 50-65 m of Coniacian - mainly hard, fossiliferous limestones.

An even shorter third order cycle caused a new transgression during the Late Coniacian.

There are two main types, Santonian and Coniacian.

The fossils have been dated to the late/upper Coniacian to Santonian periods.

This dinosaur lived from the late Turonian to the late Coniacian, approximately 89-85 million years ago.

The overlying Coniacian is slightly discordant.

The Coniacian is often subdivided into Lower, Middle and Upper substages.

The Coniacian is preceded by the Turonian and followed by the Santonian.

Plottier Formation (late Coniacian ?

The Coniacian is named after the city of Cognac in the French region of Saintonge.

The sedimentation in the flysch basins during the Turonian and during the Coniacian is very unsettled.

The strata date from the late Coniacian to the early Santonian stage of the Late Cretaceous.

After a maximum of the global sea level during the early Turonian, the Coniacian was characterized by a gradual fall of the sea level.

The following regression (Co1, at 87,0 Ma) separates the Middle from the Upper Coniacian substage.

Broadly defined, Pteranodon existed for more than four million years, during the late Coniacian to early Campanian stages of the Cretaceous period.

Barroisiceras is an acanthoceratacean ammonite from the Upper Cretaceous, Coniacian, included in the family Collignoniceratidae.

Saurodon leanus is known to occur as early as the late Coniacian through the Santonian, in the Late Cretaceous.

Forresteria alluaudi and Forresteria hobsoni are considered marker fossils for the lower Coniacian in the American West.

The Coniacian and the Santonian are expressed as typical chalky limestones in the north, but both stages take on a more sandy character east of Périgueux.

Platecarpus fossils have been found in rocks that date back to the late Coniacian through the early Campanian in the Smoky Hill Chalk.

It has been assigned radiometric ages between 88 and 87 million years BP and therefore reached its cooling stage in the Coniacian (Upper Cretaceous).

Turonian to Coniacian representing the sedimentary succession of Abu Rawash Formation that differentiated into six informal units (members) from younger to older as follows:

In magnetostratigraphy, the Coniacian is part of magnetic chronozone C34, the so called Cretaceous Magnetic Quiet Zone, a relatively long period with normal polarity.

The known remains, holotype MCF-PVPH 77, were uncovered in layers of the Portezuelo Formation dating to the Coniacian.