2.4 Global Climate and Sea Level Change Flashcards
Which way has the British area moved throughout time?
Northward
What would the climate have been like in the British Isles in carboniferous times?
Warm - equatorial climate
What would the climate have been like in the British Isles in Permian and Triassic times?
Hot desert climate
What kind of rocks were formed in the lower Paleozoic era? (15-30° south of equator)
- greywacke (sandstone)
- shale
- granite
- gneiss
- slate
- schist
Where was the British Isles positioned in the lower Paleozoic era?
15-30° south of the equator
Rock formed in the Lower Carboniferous era?
Shelly limestone
Where was the British Isles positioned in the Lower Carboniferous era?
0-5° South of the equator (shallow marine)
Rocks formed in the Upper Carboniferous era?
- shale
- sandstone
- coal
- fossil plants
Where was the British Isles positioned in the Upper Paleozoic era?
5° North of the equator
Rocks formed in the Permian era?
- desert sandstone
- halite
- breccia
Where was the British Isles positioned in the Permian era?
15° North of the equator - desert
Rocks formed in the Jurassic era?
- shelly limestone
* oolitic limestone
Where was the British Isles positioned in the Jurassic era?
30° North of the equator (Mediterranean type sea and few land areas)
Rock formed in the Cretaceous era?
Chalk
Where was the British Isles positioned in the Cretaceous era?
40° North of the equator (covered in sea due to sea level rise)
Rock formed in the Cenozoic era?
Basalt
Where was the British Isles positioned in the Cenozoic era?
45°N - mainly land
Rock formed in the Quaternary era?
Breccia
Where was the British Isles positioned in the Quaternary era?
British isles in present position
Who put forward the idea of natural selection?
Charles Darwin and Alfred Wallace
What shows that there used to be little oxygen in the oceans?
In Australia - ancient banded ironstones
Approximately, when did the oxygen in the oceans and atmosphere begin to rise?
2 billion years ago
