トップページ(top page)> 中生代・ジュラ紀後期の世界(The world of Late Jurassic )
|
中生代・ジュラ紀後期の世界
( Late Jurassic ) 1億7000万〜1億4500万年前 (170 million years〜147 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 |
Gondwana had begun to separate.
Because the climate was warmer than it is today, there were no polar
ice caps and the sea levels were higher all over the world.
|
生物 Life |
The climate of hot and humid with rain allowed plants and animals
to increase in variety and to grow bigger.
The gymnosperms (Gymnospermae) such as Ginkgo or Cycads flourished and
the angiosperms first appeared during this period.
Ammonites and Plankton flourished in the sea and Dinosaurs evolved
into many sizes and shapes on the land.
Also,
Archaeopteryx appeared first during this period.
| 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)> ジュラ紀後期の世界(The world of Late Jurassic )