Induan Stage

Induan Stage

      lowermost of two divisions of the Lower Triassic Series, representing those rocks deposited worldwide during Induan time (from 251 million to 249.7 million years ago) in the Triassic Period. The stage name is derived from the Indus River in the Salt Range of Pakistan. The stratotype for the Induan, as originally defined, is the strata above the Chhideru beds and below the Upper Ceratite Limestone of the Salt Range. The Induan stage is subdivided into two substages, which in ascending order are the Griesbachian and Dienerian. Induan marine strata are correlated worldwide by six biozones (biozone) containing ammonoid cephalopod index fossils. Five of these biozones have designated type localities in North America. These zones cannot be used for nonmarine rocks, however. The Induan Stage underlies the Olenekian Stage of the Lower Triassic Series and overlies the Changhsingian Stage of the Permian Series.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Induan — The Induan (also known as the Feixianguanian) is the first stage of the Early Triassic epoch. It spans the time between 251 ± 0.4 Ma and 249.7 ± 0.7 Ma (million years ago). This stage follows the mass extinction event of the late Permian period.… …   Wikipedia

  • Olenekian Stage — ▪ geochronology       uppermost of two divisions of the Lower Triassic Series, representing those rocks deposited worldwide during Olenekian time (249.7 million to 245 million years ago) in the Triassic Period. The stage name is derived from the… …   Universalium

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

  • Changhsingian — System Series Stage Age (Ma) Triassic Lower Induan younger Permian Lopingian …   Wikipedia

  • Triassic Period — Interval of geologic time, с 248–206 million years ago, that marks the beginning of the Mesozoic Era. Many new vertebrates emerged during the Triassic, heralding the major changes that were to occur in both terrestrial and marine life forms… …   Universalium

  • Chrotichthys — Temporal range: Induan[1] …   Wikipedia

  • Coletta (genus) — Coletta Temporal range: Early Triassic, Induan …   Wikipedia

  • Phaanthosaurus — Temporal range: Early Triassic, Induan …   Wikipedia

  • Mahavisaurus — Temporal range: Early Triassic, Induan …   Wikipedia

  • Nanolania — Temporal range: Early Triassic, Induan …   Wikipedia

Share the article and excerpts

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