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Information about Barremian

The Barremian faunal stage was a period of geological time between 130.0 ± 1.5 Ma and 125.0 ± 1.0 Ma (million years ago). It is considered to be of the early Cretaceous period.

History

The type locality (stratigraphic section) for the Barremian stage is in the vicinity of the village of Barrême, Alpes-de-Haute-Provence, France. Henry Coquand, defined the stage and named it in 1873. The base of the Barremian is determined by the first appearance of the ammonites Spitidiscus hugii and Spitidiscus vandeckii. The end of the Barremian is determined by the magnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite Paradeshayesites oglanlensis.

Fauna

Ammonites

  • Acantholytoceras
  • Almohadites
  • Astieridiscus
  • Costidiscus
  • Gymnoplites
  • Janenschites
  • Kabylites
  • Macroscaphites
  • Metahoplites
  • Parasaynoceras
  • Pascoeites
  • Pedioceras
  • Pseudohaploceras
  • Shasticrioceras

Lower Barremian

The following is a list of Ammonite genera whose fossils are geochronologically found first in lower Barremian strata. These genera may survive into later portions of the Barremian stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included.
  • Anclyoceras
  • Eoheteroceras
  • Hamulina
  • Hamulinites
  • Heinzia
  • Karsteniceras
  • Lytocrioceras
  • Manoloviceras
  • Pulchellia
  • Silesites
  • Subpulchellia
  • Torcapella
  • Uhligia
  • Veleziceras
  • Veveysiceras

Upper Barremian

The following is a list of Ammonite genera whose fossils are geochronologically found first in upper Barremian strata. These genera may survive into later portions of the Barremian stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included.
  • Aconeceras
  • Annuloceras
  • Callizoniceras
  • Carstenia
  • Colchidites
  • Coronites
  • Ptychoceras
  • Chalalabelus
  • Dirrymoceras
  • Deshayesites
  • Hamiticeras
  • Hemibaculites
  • Heteroceras
  • Lopholobites
  • Paranclyoceras
  • Sanmartinoceras
  • Tonoceras
  • Zurcherella

Belemnites

  • Curtohibolites
  • Neohibolites
  • Oxyteuthis

Nautiloids

  • Eucymatoceras

Upper Barremian

The following is a list of Nautiloid genera whose fossils are geochronologically found first in upper Barremian strata. These genera may survive into later portions of the Barremian stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included.
  • Palelialia
  • Pseudaturoidea

Teuthida

Upper Barremian

The following is a list of Teuthidagenera whose fossils are geochronologically found first in upper Barremian strata. These genera may survive into later portions of the Barremian stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included.
  • Maioteuthis
  • Neololigosepia

See Also

References

  • The International Commission on Stratigraphy
  • Cossmann, M. & Pelat, E. (1907) "Le Barrémien supérieur à faciès Urgonien de Brouzet-lès-Alais (Gard)" Mém. Soc. Géol. France, Paléontologie, 15(37): pp. 5-42
  • Guzhikov, A. Yu. and Baraboshkin, E. J. (2006) "Assessment of diachronism of biostratigraphic boundaries by magnetochronological calibration of zonal scales for the Lower Cretaceous of the Tethyan and Boreal belts" Doklady Earth Sciences 409(6): pp. 843-846, DOI: DOI 10.1134/S1028334X06060018
Cretaceous period
Lower/Early Cretaceous Upper/Late Cretaceous
Berriasian | Valanginian | Hauterivian
Barremian | Aptian | Albian		Cenomanian | Turonian | Coniacian
Santonian | Campanian | Maastrichtian
Faunal stages are subdivisions of rock layers used primarily by paleontologists who study fossils rather than by geologists who study rock formations. Typically, a faunal stage will consist of a series of rocks that contain similar fossils.
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Annum is a Latin noun meaning year. It is the accusative singular of the second declension masculine noun annus (nominative), anni (genitive) [1] .

As a unit of time, it is defined as exactly 365.
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The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i.e. from 145.5 ± 4.0 million years ago (Ma)) to the beginning of the Paleocene epoch of the Tertiary Period (about 65.5 ± 0.3 Ma).
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Alpes-de-Haute-Provence

Coat of arms of the Alpes-de-Haute-Provence department
Location

Administration
Department number: 04
Region: Provence-Alpes-Côte d'Azur
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Motto
Liberté, Égalité, Fraternité
"Liberty, Equality, Fraternity"
Anthem
"La Marseillaise"


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A chronozone or chron is a slice of time that begins at a given event and ends at another. It is non-hierarchical in that chronozones do not need to correspond across geographic or geologic boundaries, nor be equal in length.
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For other uses, see Squid (disambiguation).


Superconducting Quantum Interference Devices (SQUID) are very sensitive magnetometers used to measure extremely small magnetic fields, based on superconducting loops
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List of fossil sites:

Africa


Africa
Site Country/State Age
Afar Depression Ethiopia Pliocene
Ahl al Oughlam Morrocco Late Pliocene
Awash River Ethiopia Pliocene
Baharija Formation Northern Africa Upper Cretaceous
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The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i.e. from 145.5 ± 4.0 million years ago (Ma)) to the beginning of the Paleocene epoch of the Tertiary Period (about 65.5 ± 0.3 Ma).
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The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous Period. It began about 146 million years ago.
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Late Cretaceous (100mya - 65mya) refers to the second half of the Cretaceous Period, named after the famous white chalk cliffs of southern England, which date from this time. Rocks deposited during the Late Cretaceous Period are referred to as the Upper Cretaceous Series.
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In the geologic timescale, Berriasian is a stage of the Early Cretaceous epoch. It spanned between 145.5 ± 4.0 Ma and 140.2 ± 3.0 Ma (million years ago). The Berriasian stage succeeds the Tithonian stage of the Late Jurassic epoch and precedes the Valanginian stage of the Early
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In the geologic timescale, Valanginian is a stage of the Early Cretaceous epoch. It spanned between 140.2 ± 3.0 Ma and 136.4 ± 2.0 Ma (million years ago). The Valanginian stage succeeds the Berriasian stage of the Early Cretaceous and precedes the Hauterivian stage of the Early
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The Hauterivian is a stage of the Early Cretaceous Epoch. It spans the time between 136.4 ± 2 Ma and 130 ± 1.5 Ma (million years ago).

Fauna

Ammonites

  • Abrytasites

Dinosaurs

  • Afrovenator
  • Histriasaurus

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Aptian stage is a faunal stage of the Early Cretaceous epoch in the geologic timescale, that extends from 125.0 ± 1.0 Ma to 112.0 ± 1.0 Ma (million years ago), approximately. The Aptian stage succeeds the Barremian stage and precedes the Albian stage, all in the same epoch.
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Albian (French Albion, from Alba = Aube in France) Albian is a stage of the Cretaceous period.

Albian is a term proposed in 1842 by A. d'Orbigny for that stage of the Cretaceous system which comes above (later) the Aptian and below (before) the Cenomanian (Pal.
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The Cenomanian (also known as Woodbinian) is the first stage of the Late Cretaceous Epoch. It spans the time between 99.6 ± 0.9 Ma and 93.5 ± 0.8 Ma (million years ago).
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The Turonian is a stage of the Late Cretaceous Epoch. It spans the time between 93.5 ± 0.8 Ma and 89.3 ± 1 Ma (million years ago).

The Turonien was definied by the French paleontologist Alcide d'Orbigny (1802 - 1857), who named it after the city of Tours in the French
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The Coniacian is a stage of the Late Cretaceous Epoch. It spans the time between 89.3 ± 1 Ma and 85.8 ± 0.7 Ma (million years ago).

References

  • GeoWhen Database - Coniacian

Cretaceous period
Lower/Early Cretaceous Upper/Late Cretaceous
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The Santonian is a stage (geologic Age [1] ) of the Late Cretaceous Epoch. It spans the time between 85.8 ± 0.7 Ma and 83.5 ± 0.7 Ma (million years ago).

References

  • GeoWhen Database - Santonian

Cretaceous period
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The Campanian is a stage on the geologic time scale occurring from 83.5 ± 0.7 Ma to 70.6 ± 0.6 Ma (million years ago).

It is the middle stage of the Late Cretaceous Epoch.

It is named after the French village of Champagne in the departement Charente-Maritime.
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The Maastrichtian is the last stage of the Cretaceous period, and therefore of the Mesozoic era. It spanned from 70.6 ± 0.6 Ma to 65.5 ± 0.3 Ma (million years ago).
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