Furongian


Furongian

The Furongian (which represented approximately the old notions of Late Cambrian, Merioneth, Croixian, or Potsdamian) is the third and final geological epoch of the Cambrian Period. It spans the time between 501 ± 2 Ma and 488.3 ± 1.7 Ma (million years ago). It has been proposed to divided it three ICS stages, of which only the first (Paibian) is actually defined. Rocks of the Late Cambrian epoch are referred to as Upper Cambrian strata. During the Furongian, trilobites proliferated; they serve as useful index fossils. Mollusks also became more diverse and new groups such as the graptolites and the conodonts, probable early chordates, also appeared during the Furongian epoch.

References

* [http://www.stratigraphy.org/geowhen/stages/Late_Cambrian.html GeoWhen Database - Late Cambrian]

See also

* Cambrian-Ordovician extinction


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  • Furongian — 1. adjective Of a geologic epoch within the Cambrian period from about 501 to 488 million years ago; marked by an explosion of life. 2. noun The Furongian epoch …   Wiktionary

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  • Chippewaella — Temporal range: 501–488 Ma …   Wikipedia

  • Paibian — In the geologic timescale, the Paibian is the age of the Furongian epoch of the Cambrian period of the Paleozoic era of the Phanerozoic eon that is comprehended between 501.0 ± 2.0 Ma and approximately 496.0 Ma (million years ago), approximately …   Wikipedia

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