カティアン

Also known as Katian Stage, Katian Age

The Katian is the second stage of the Upper Ordovician. It is preceded by the Sandbian and succeeded by the Hirnantian Stage. The Katian began million years ago and lasted for about 7.6 million years until the beginning of the Hirnantian million years ago. During the Katian the climate cooled which started the Late Ordovician glaciation.

Key facts

Geologic timespan.name: Katian
Geologic timespan.color: Katian
Geologic timespan.time_start: 452.8
Geologic timespan.time_start_uncertainty: 0.7
Geologic timespan.time_end: 445.2
Geologic timespan.time_end_uncertainty: 0.9
Geologic timespan.image_map: Geology of Asia 450.Ma.jpg
Geologic timespan.caption_map: Paleogeography of the Katian, 450 Ma
Geologic timespan.timeline: Ordovician
Geologic timespan.name_formality: Formal
Geologic timespan.celestial_body: earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Age
Geologic timespan.strat_unit: Stage
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: FAD of the graptolite Diplacanthograptus caudatus
Geologic timespan.lower_gssp_location: Black Knob Ridge section, Oklahoma, United States

via Wikipedia infobox

Wikidata facts

Instance of: age
Followed by: Hirnantian
Follows: Sandbian

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sRGB color hex triplet: 81D6BC
start time: 453000000-
end time: 445200000-

Sources (5)

via Wikidata · CC0

Article · 日本語

カティアン（英: Katian）は、によって定められた地質学用語である、地質時代名の一つ。4億5300万年前（誤差70万年）から4億4520万年前（誤差140万年）にあたる、後期オルドビス紀を三分した中期である。前の期は後期オルドビス紀前期であるサンドビアン、次の期は後期オルドビス紀後期であるヒルナンシアン。日本語ではケイティ期とも呼ばれる。名前はアメリカ合衆国オクラホマ州アトカ郡のケイティ湖に由来する。

Abstract from DBpedia / Wikipedia · CC BY-SA

On the map

5 mapped locations

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