Colliding Continent & Fold Mountains
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Colliding Continent & Fold Mountains as PDF for free.
More details
- Words: 325
- Pages: 23
CONTINENTS
The classic example of two continents colliding is the sub continent of India colliding with the continent of Asia. A European example can be found where Italy collided with the rest of Europe, now Switzerland and Austria.
Asia
India
Mantle
India has been steadily drifting North away from Africa after PANGEA broke up.
As India moved towards Asia, the sea between the two land masses, called the Sea of Tethys had new layers of sediment laid down on the sea bed, brought by rivers flowing off the two continents Rivers carry masses of sediment into the sea
Asia
Sea of Tethys
India
India bulldozes the sea floor sediments up into folds, making the Sea of Tethys even shallower. Sea get shallower as sediments builds up and is pushed into folds by India acting like a bulldozer.
Asia
India
Descending plate re-melts in the upper mantle.
Gradually as the sediments get pushed even higher, the Sea of Tethys begins to disappear, leaving stranded salt lakes
Salt lakes
Asia
India Layers of sediment get increasingly folded.
As the sea dries up, the salt lakes become the salt deposits of the future, trapped in fold mountains. The sea has now gone, leaving a range of young fold mountains.
Asia
India
The folding becomes more dramatic and complex as the fold mountains get higher. Volcanic activity increases.
Asia
India
Asia
India
The new range of mountains is called the Himalayas. They are entirely made from sedimentary and metamorphic rock.
Asia
India
As the two continents collide, the destructive plate margin becomes inactive and volcanic activity almost stops. There is still some forward movement of the Indian plate, so the Himalayas are still growing higher.
Asia
India
Eventually, some time in the future, a new destructive plate margin will form at the edge of the Indian Ocean.
Asia
India
New plate margin forms under the Indian Ocean.
The next sequence of slides shows the process again, without the labels.
The classic example of two continents colliding is the sub continent of India colliding with the continent of Asia. A European example can be found where Italy collided with the rest of Europe, now Switzerland and Austria.
Asia
India
Mantle
India has been steadily drifting North away from Africa after PANGEA broke up.
As India moved towards Asia, the sea between the two land masses, called the Sea of Tethys had new layers of sediment laid down on the sea bed, brought by rivers flowing off the two continents Rivers carry masses of sediment into the sea
Asia
Sea of Tethys
India
India bulldozes the sea floor sediments up into folds, making the Sea of Tethys even shallower. Sea get shallower as sediments builds up and is pushed into folds by India acting like a bulldozer.
Asia
India
Descending plate re-melts in the upper mantle.
Gradually as the sediments get pushed even higher, the Sea of Tethys begins to disappear, leaving stranded salt lakes
Salt lakes
Asia
India Layers of sediment get increasingly folded.
As the sea dries up, the salt lakes become the salt deposits of the future, trapped in fold mountains. The sea has now gone, leaving a range of young fold mountains.
Asia
India
The folding becomes more dramatic and complex as the fold mountains get higher. Volcanic activity increases.
Asia
India
Asia
India
The new range of mountains is called the Himalayas. They are entirely made from sedimentary and metamorphic rock.
Asia
India
As the two continents collide, the destructive plate margin becomes inactive and volcanic activity almost stops. There is still some forward movement of the Indian plate, so the Himalayas are still growing higher.
Asia
India
Eventually, some time in the future, a new destructive plate margin will form at the edge of the Indian Ocean.
Asia
India
New plate margin forms under the Indian Ocean.
The next sequence of slides shows the process again, without the labels.
Related Documents
Colliding Continent & Fold Mountains
April 2020 5
Mountains
November 2019 27
Mountains
November 2019 25
Mountains
May 2020 16
Lopsided Continent
November 2019 21