Katian

Key events in the Ordovician

view • discuss •

-485 —

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-455 —

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-445 —

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Cambrian

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Silurian

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Tremadocian

Floian

Dapingian

Darriwilian

Sandbian

Katian

Hirnantian

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First land plant spores

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Ordovician meteor event

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Archaeocyatha extinction

Key events of the Ordovician Period.
ICS approved stages.

Axis scale: millions of years ago.

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 453.0 ± 0.7 million years ago and lasted for about 7.8 million years until the beginning of the Hirnantian 445.2 ± 1.4 million years ago.

单词	Katian
释义	Katian 英语百科 Katian Key events in the Ordovician view • discuss • -485 — – -480 — – -475 — – -470 — – -465 — – -460 — – -455 — – -450 — – -445 — – P a l e o z o i c Cambrian O r d o v i c i a n Silurian E a r l y M i d d l e L a t e Tremadocian Floian Dapingian Darriwilian Sandbian Katian Hirnantian ← First land plant spores ← Ordovician meteor event ← Archaeocyatha extinction Key events of the Ordovician Period. ICS approved stages. Axis scale: millions of years ago. 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 453.0 ± 0.7 million years ago and lasted for about 7.8 million years until the beginning of the Hirnantian 445.2 ± 1.4 million years ago.
随便看	SSBI的意思 SSBJ的意思 SSBL的意思 SSBM的意思 SSB modulation的意思 ssb modulator的意思 SSBN的意思 SSBN的意思 SSBP的意思 SSB protein的意思 SSBR的意思 SSB receiver的意思 SSB的意思 SSB transmitter的意思 SSC的意思 S. S. C.的意思 S.S.C.的意思 SSCA的意思 sscannogram的意思 SSCC的意思 S.Sc.D.的意思 SSCF的意思 S.schottmuelleri的意思 SSCI的意思 sscis的意思