Barremian Stage

Barremian Stage

      fourth of six main divisions (in ascending order) in the Lower Cretaceous Series, representing rocks deposited worldwide during the Barremian Age, which occurred 130 to 125 million years ago during the Cretaceous Period. Rocks of the Barremian Stage overlie those of the Hauterivian Stage and underlie rocks of the Aptian Stage.

      The classic type district for rocks of this age is located at Angles, in Alpes-de-Hautes-Provence département in southeastern France, but the stage's name is derived from localities at nearby Barrême. In northern Continental Europe the Barremian Stage is represented by portions of the thick Hils clay, while in England it includes the upper portions of the Wealden sandstones and clays. The base of the stage is generally taken at a point containing the ammonite (ammonoid) genus Pseudothurmannia as an index fossil. The Barremian has been divided into several biozones (biozone) representing shorter spans of time, one of which is characterized by the calcareous nannofossil Nannoconus steinmanni. The planktonic foraminiferan Hedbergella sigali is also an index fossil for rocks of this age.

* * *


Universalium. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Barremian — The Barremian faunal stage was a period of geological time between 130.0 ± 1.5 mya (million years ago) and 125.0 ± 1.0 mya). It is considered to be of the Early Cretaceous epoch, in which it constituted the earliest part of the obsolete Gallic… …   Wikipedia

  • Aptian Stage — ▪ geology       fifth of six main divisions (in ascending order) in the Lower Cretaceous Series, representing rocks deposited worldwide during the Aptian Age, which occurred 125 to 112 million years ago during the Cretaceous Period. Rocks of the… …   Universalium

  • Hauterivian Stage — ▪ geology       third of six main divisions (in ascending order) in the Lower Cretaceous Series, representing rocks deposited worldwide during the Hauterivian Age, which occurred 136.4 to 130 million years ago during the Cretaceous Period. Rocks… …   Universalium

  • Oxfordian (stage) — System Series Stage Age (Ma) Cretaceous Lower Berriasian younger Jurassic Upper Tith …   Wikipedia

  • Cretaceous Period — Interval of geologic time from с 144 to 65 million years ago. During the Cretaceous the climate was warmer than today. In the seas, marine invertebrates flourished, and bony fishes evolved. On land, flowering plants arose, and insects, bees in… …   Universalium

  • angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

  • Iguanodon — Taxobox name = Iguanodon fossil range = Early Cretaceous image width = 250px image caption = Iguanodon bernissartensis skull regnum = Animalia phylum = Chordata classis = Sauropsida superordo = Dinosauria ordo = Ornithischia subordo = Cerapoda… …   Wikipedia

  • Species of Psittacosaurus — Seventeen species have been assigned to the extinct ceratopsian dinosaur genus Psittacosaurus , although only nine to eleven are considered valid.Xu Xing Zhao Xijin. (1999). Psittacosaur fossils and their stratigraphical implications. In: Wang Y …   Wikipedia

  • 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,… …   Wikipedia

  • Harpymimus — Taxobox name = Harpymimus fossil range = Early Cretaceous image width = 250px image caption = Restoration of Harpymimus by a nest regnum = Animalia phylum = Chordata classis = Sauropsida superordo = Dinosauria ordo = Saurischia subordo =… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”