In the geologic timescale, the Telychian is the age of the Llandovery epoch of the Silurianperiod of the Paleozoicera of the Phanerozoiceon that is comprehended between 436.0 ± 1.9 Ma and 428.2 ± 2.3 Ma (million years ago), approximately. The Telychian age succeeds the Aeronian age and precedes the Sheinwoodian 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. ... 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. ...
Category: Geology stubs The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 443. ... In the geological timescale, the Llandovery epoch (from 443. ... The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ... In the geological timescale, the Ludlow epoch (from 422. ... In the geological timescale, the Pridoli epoch (from 418. ... 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. ...
Aeronian fl shales and overlying Telychian greenish-grey and red claystones of the deep shelf of the East Baltic Basin indicate different synsedimentary redox conditions of the bottom water of the sea.
In the Aeronian, the primary bioproductivity rise caused accumulation of organic-rich fl shale in deep shelf and formation of microcrystalline limestone with chertification, chert nodules, and barite in shoreward areas.
In the early Telychian, the bioproductivity decreased, as concluded from the absence of indicators of high primary bioproductivity in the Aeronian.
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