トップページ(top page)> 古生代シルル紀の世界(The world of Silurian Period )
|
古生代・シルル紀の世界
( Silurian Period ) 4億4400万年前〜4億1600万年前 (444 million years〜416 million years ago) |
|
(The former age) 前の時代へ←■ →次の時代へ (The next age) |
|
世界の様子 Environment |
Laurentia and Baltica collided 420 million years ago and the Iapetus Ocean closed.
The Caledonian Orogeny began forming a mountain chain running from north to south.
These mountains blocked the air, produced heavy rain, and made great fresh-water rivers along the mountains.
A lot of plant, arthropod and fish appeared in this new freshwater environment.
|
生物 Life |
The land plants appeared first in the kingdom Plantae.
The first vascular plants having tube-like structures that
transport water appeared, and which allowed them to move further.
The first land plants called "Cooksonia".
初めて陸上に姿を現した植物「クックソニア」
The first land plants called "Cooksonia".
| 古生代 | エディアカラ紀 | カンブリア紀 | オルドビス紀 | シルル紀 | デボン紀 | 石炭紀 | ペルム紀 |
|---|---|---|---|---|---|---|---|
| 中生代 | 三畳紀前期 | 三畳紀後期 | ジュラ紀前期 | ジュラ紀後期 | 白亜紀前期 | 白亜紀後期 | |
| 新生代 | 古第三紀 | 新第三紀 | 第四紀 | ||||
| 現在 | 現在 | ||||||
| 未来 | 500万年後 | 5000万年後 | 1億年後 | 2億年後 |
トップページ(top page)> 古生代・シルル紀の世界(The world of Silurian Period )