A hotspot is a phenomenon when magma generated by the hotspot rises through the rigid plates of the lithosphere. It can produces active volcanoes at the Earth's surface. The plate is pushing away from the center.
When a transform occur, two plates are sliding past one and each other. At the same the, the faulting line is created and big depression will happen which can lead to major earthquakes after.
An oceanic-oceanic convergence is a type of boundary which two oceanic plates collide which each other and one oceanic plate is subducted to the o there oceanic plate. An ocean trench marks the location where the plate is pushed down into the mantle. Lava will rise from asthenosphere and lithosphere. The line of volcanoes that grows on the upper oceanic plate will form an island arc.
An oceanic-continental convergence is a boundary where an oceanic plate collides with a continental plate. When the two plates meet, the denser oceanic plate is forced to sink under the continental plate. This process is called subduction, and the created region is called a subduction zone where allows a lot of intense earthquakes. At the some time, the high pressure of the plates can cause the melting of magma and the lava would rise to form volcanoes.
A continental-continental convergence is a boundary where the folding and faulting of two continental plates occur. When two continental plates collide, due to their similar density, they resist each other and the curst buckles are pushed up to form fold mountains ranges. Earthquake can also be resulted from this movement. This type of convergence produces the famous Himalayas Mountains.
A divergent boundary is a boundary where two tectonic plates move away from each other. As the two plates separate, the faulting block between the two plates cracks and drops into the asthenosphere which is under the lithosphere. The sinking block forms a rift valley. Magma seeps up to fill the cracks. Volcanoes form where the magma came out of the cracks, and earthquakes occur along the faulting block. Mid-Atlantic Ridge and African Rift Valley are examples of divergent boundaries.
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