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Ypresian Stage

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  • Ypresian Stage — ▪ geology       oldest division of Eocene (Eocene Epoch) rocks, representing all rocks deposited worldwide during the Ypresian Age (55.8 million to 48.6 million years ago) of the Paleogene Period (65.5 million to 23 million years ago). The… …   Universalium

  • Ypresian — The Ypresian is the first stage of the Eocene Epoch and usually corresponds to the Early Eocene subepoch, though sometimes the Lutetian is included therein.It spans the time between 55.8 ± 0.2 Ma and 48.6 ± 0.2 Ma (million years ago). The stage… …   Wikipedia

  • Cuisian Stage — ▪ geology       subdivision of Eocene rocks and time (the Eocene Epoch began about 54,000,000 years ago and lasted about 16,000,000 years) in western Europe. The Cuisian Stage, which precedes the Lutetian Stage and follows the Ypresian Stage, was …   Universalium

  • Lutetian Stage — ▪ geology       the second of four stages (in ascending order) subdividing Eocene (Eocene Epoch) rocks, representing all rocks deposited worldwide during the Lutetian Age (48.6 million to 40.4 million years ago) of the Paleogene Period (65.5… …   Universalium

  • Thanetian Stage — ▪ paleontology       uppermost division of Paleocene (Paleocene Epoch) rocks, representing all rocks deposited worldwide during the Thanetian Age (58.7 million to 55.8 million years ago) of the Paleogene Period (65.5 million to 23 million years… …   Universalium

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

  • Neoephemera antiqua — Temporal range: Ypresian …   Wikipedia

  • Eocene Epoch — Major division of the Tertiary Period, from 54. 8 to 33.7 million years ago. It follows the Paleocene Epoch and precedes the Oligocene Epoch. The name, derived from the Greek eos ( dawn ), refers to the dawn of recent life; during the Eocene, all …   Universalium

  • Point Stratotypique Mondial — Le Point Stratotypique Mondial (PSM) (Global Boundary Stratotype Section and Point, GSSP), définit les limites existantes entre deux étages géologiques, ne laissant pas la posssibilité de vide ou de chevauchement entre eux. Les PSM sont établie… …   Wikipédia en Français

  • Point stratotypique mondial — Le Point Stratotypique Mondial (PSM) (Global Boundary Stratotype Section and Point, GSSP), définit les limites existantes entre deux étages géologiques, ne laissant pas la possibilité de vide ou de chevauchement entre eux. Les PSM sont établis… …   Wikipédia en Français

  • Points Stratotypiques Mondiaux — Point stratotypique mondial Le Point Stratotypique Mondial (PSM) (Global Boundary Stratotype Section and Point, GSSP), définit les limites existantes entre deux étages géologiques, ne laissant pas la posssibilité de vide ou de chevauchement entre …   Wikipédia en Français