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Lecture 6

EESA06H3 Lecture Notes - Lecture 6: Tethys Ocean, Oceanic Crust, Arabian Plate

Environmental Science
Course Code
Nick Eyles

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Lecture 6: Notes
Continents come together and destroy a lot of oceanic crust.
The age of the crust increases systematically as we get towards margins.
Tethys Ocean - is going to close as Gondwana which will move up into Eurasia.
India is going to move to the north, Australia’s going to move to the northeast the sediments and
the crust that was present in that ocean going to get caught in a collision zone and will get obducted.
Matterhorn Europe’s highest mountain which made out of African rock that had been pushed a
thousand kilometres to the north.
Pompeii was buried under metres of pyroclastic debris in AD 79.
The Himalayas are made up of salt in some places, and a lot of marine sedimentary rocks + ice.
The Arabian plate is moving north into Europe and Turkey is moving to the west. China is trying
to escape the collision zone by moving to the east.
Major faults in China produce large earthquakes and is all because of the collision with India.
Ophiolite is the generic name we give to ancient ocean crust, ancient basalts which are now in the
middle of continents.
Gneiss - highly metamorphose rock that has been completely changed by pressure and heat.
Crustal melting produces a rock called granite.
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