Describe the volcanoes of East Africa. Why is this area producing volcanoes even

Question

Describe the volcanoes of East Africa. Why is this area producing volcanoes even on an area that isn't marked as a complete boundary?

Can you find other places that have volcanoes not at convergent plate margins?

How do we explain volcanoes like those given the theory of plate tectonics?

Compare the elevation on either side of oceanic convergent plate boundaries. How are they different?

Compare the elevation on either side of oceanic divergent plate boundaries. How are they different?

The Himalayan Mountains are on what type of plate boundary? Describe what is happening here to form these mountains?

Identify the area of the world (pick a country, maybe a couple countries at most) that you feel is most prone to disasters such as earthquakes, volcanoes, and tsunamis. Check out the webpage which describes one NGO's ranking of at risk countries from disasters overall http://www.air-worldwide.com/Blog/Five-Countries-Most-Frequently-Hit-by-Natural-Disasters/. Does your ID agree (why or why not? What are we missing)?

Explanation / Answer

The East African Rift Zone includes a number of active as well as dormant volcanoes, among them: Mount Kilimanjaro, Mount Kenya, Mount Longonot, Menengai Crater, Mount Karisimbi, Mount Nyiragongo, Mount Meru and Mount Elgon, as well as the Crater Highlands in Tanzania.

The gravitational stress field caused by the pre-existing volcano tends to yield downslope-directed directions of least compressive stresses. Because dikes orient themselves so that their direction of widening is parallel to this least compressive stress, the dikes end up propagating parallel to the volcano-volcano boundary.

In plate tectonics, a convergent boundary, also known as a destructive plate boundary , is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide. As a result of pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are common near convergent boundaries.

The maximum continental elevation is about 8848 meters (Mt. Everest) and the deepest trench is about 10,000 meters (Mariana Trench).

The continued growth in the Himalayas is likely due to the Indian tectonic plate still moving slowly but surely northward. Around 220 million years ago, around the time that Pangea was breaking apart, India started to move northwards. It travelled some 6,000 kilometres before it finally collided with Asia around 40 to 50 million years ago. Then, part of the Indian landmass began to go beneath the Asian one, moving the Asian landmass up, which resulted in the rise of the Himalayas.

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