sustain (sustains 3rd person present) (sustaining present participle) (sustained past tense & past participle) 1 verb If you sustain something, you continue it or maintain it for a period of time. But he has sustained his fierce social conscience from young adulthood through old age... V n. ...a period of sustained economic growth throughout 1995.
If oceanic and continental crust collides the denser one which is the oceanic crust will be subducted, go underneath, the continental crust. The high heat of the mantle causes the oceanic crust to melt into magma. If the crust gets cracked this allows magma to rise and come out of the crust as lava which will form Volcanoes. When two continental crusts collide, the crust is forced to go upwards which forms mountains.
Properties and Composition of the Earth's Crust. The continental crust is between 10 km and 70 km thick, depending on the location. As you descend through the crust, the temperature increases from surface temperature to between 300 degrees Celsius and 500 degrees Celsius.ontinental crust is between 10 km and 70 km thick, reaches temperatures as high as 500 degrees Celsius, pressures as high as 91,000 atmospheres, and is made up of rock that is mostly felsic and granitic. It is thanks to the formation of continental crust that humans and all land-evolved species exist.