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Encyclopedia > Rhuddanian

In the geologic timescale, the Rhuddanian is the age of the Llandovery epoch of the Silurian period of the Paleozoic era of the Phanerozoic eon that is comprehended between 443.7 ± 1.5 Ma and 439.0 ± 1.8 Ma (million years ago), approximately. The Rhuddanian agesucceeds the Ordovician Period and precedes the Aeronian age. The geologic time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ... A geologic age is a time period on the geologic timescale delimited by major geologic or paleontologic events. ... Llandovery (Welsh: Llanymddyfri) is a market town in Carmarthenshire, Wales, lying on the River Tywi and the A40 road. ... The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 443. ... In geology, a period or age is a time span of many millions of years that are assumed to have had similar characteristics. ... The Paleozoic Era (from the Greek palaio, old and zoion, animals, meaning ancient life) is the earliest of three geologic eras of the Phanerozoic eon. ... The table and timeline of geologic periods presented here is in accordance with the dates and nomenclature proposed by the International Commission on Stratigraphy. ... The Phanerozoic (occasionally Phaenerozoic) Eon is the period of geologic time during which abundant animal life has existed. ... In general usage, an eon (sometimes spelled aeon) is a very long period of time. ... Annum is a Latin noun meaning year. ... The Ordovician period is the second of the six (seven in North America) periods of the Paleozoic era. ... In the geologic timescale, the Aeronian is the age of the Llandovery epoch of the Silurian period of the Paleozoic era of the Fanerozoic eon that is comprehended between 439 million and 436 million years ago, approximatedly. ...

Silurian period
Llandovery Wenlock Ludlow Pridoli
Rhuddalian | Aeronian
Telychian
Sheinwoodian | Homerian Gorstian | Ludfordian

 
 

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