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Geological History of the Iberian Peninsula
Transcript of Geological History of the Iberian Peninsula
Triassic is the first era for reptils. Reptils colonise the sea
Iberia kept separating from Gondwana
Jurassic (210 mya)
The Iberian plate continued separating slowly from the others plates.
The Iberian Massif is a plain, vestigate of Variscan orogeny
The good climate favoured photosynthesis, which resulted in a life explosion never seen before
Geological History of the Iberian Peninsula
Geology of Autonomous
Each period that we analyze are divided in 4 parts:
The marine sedimentation
End of the Precambrian
There was life below the ice of the oceans
After the fracturation, exist:
With ocean currents
Life was getting ready for the Cambrian explosion
Cambrian (540 mya)
Equal as in Precambrian
Avalonia separated from Gondwana
The other platforms:
Calcium carbonate precipitations
Appearance of living organisms with shells.
Warm global climate
Cambrian explosion happens
New groups of living organisms
Silurian (440 mya)
Movements of Continental platforms
South Pole to Equator
Avalonia collided with Baltica
They went to Laurentia (west)
Accumulation of sediments poor in carbonates
Devonian (410 mya)
It became mild again after
Low concentrations of oxygen in Gondwana
Land was colonized by
The intense motion of the plates produced intense volcanic activity.
The climate is diverse:
Avalonia-Baltica collided with Laurentia
Carboniferous (360 mya)
Triassic (250 mya)
The high regions underwent an erosion process and accumulated in the for of strata
A global increase of temperature took place
Full conquest of the land.
Appearance of the first plants.
Vertebrates conquered the land.
Litoral areas was dominated by ferns
Appearance of coal deposits.
In south. The temperature cools down.
Iberia showed a tropical climate
The northern continents have a tropical mild climate.
Cretaceous (150 mya)
Ferns and amphibians dominate the land.
Iberia continued heading north and completed its anticlockwise rotation.
There were changes in sea level, and major provisions of calcareous sediments from the remains of the abundant marine life.
The cretaceous may have been one of the warmer seasons of our planet, due to a large greenhouse.
The first plants with flowers appeared, and soon later they started to take over the place of gymnosperms.
Also feathered dinosaurs appeared in this period.
Permian (290 mya)
All the territory, together with the future Corsica and Sardinia, had emerged
Appearance of Pangaea
At end of Permian,Pangaea fragmented in 2 plates.
Celestial body impacted on the Earth.
Intense volcanic activity all around the world.
A large amount of ash and chemicals into the
Tertiary (65 mya)
Himalaya was formed when the Indian continent collided with Asia. The African plate started to move towards Europe, which caused the formation of the Alps
The Alpine orogeny in Iberia started around 65 million years, with the rising of the pyrenees and the Cantabrian coast.
The climate was warmer and more humid than today's
The fauna and flora are similar to those in the savanna.
Quaternary (1,6 mya)
Same as today
Due the glaciations, when these thawed they left evidence of the existence by forming U-shaped valleys.
This period is characterized by an alternation between cold periods
Extreme climate of Pangaea
Impact of the celestial body
The first remains of hominids found in the Iberian Peninsula belong to this period.
Geology of the autonomous communities
Castellón: Cordillera Costero-Catalana and Sistema Ibérico.
Valencia: Sistema Ibérico
Alicante: Betic Mountain Range, Pre-Betic Mountain Range to Sub-Betic Mountain Range and Sub-Betic Depression
Ordovician (510 mya)
Movement of the continental platforms
·Avalonia to north towards Baltica.
·Baltica to westwards, towards Laurentia.
·Gondwana to South Pole.
Big glaciers were formed in Gondwana. This cooling produced a decrease in precipitation of calcium carbonate.
There was a global cooling
At the beginning of the Ordovician, the groups from the Cambrian continued with their diversification