Answer:
At convergent point of plate boundaries, sedimentary rock that is present at ocean floor is pushed down into mantle. Due to the continuous movement of rock into the mantle increase the crust the temperature. Thus after continuous rise of temperature, crust melts down and eventually rise to surface of earth in the form of volcanic eruption. and after cools down gives rise to formation of igneous rock.
Explanation:
Process of igneous rock is given below
At convergent point of plate boundaries, sedimentary rock that is present at ocean floor is pushed down into mantle. Due to the continuous movement of rock into the mantle increase the crust the temperature. Thus after continuous rise of temperature, crust melts down and eventually rise to surface of earth in the form of volcanic eruption. and after cools down gives rise to formation of igneous rock.
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Coastlines can convert back and forth among various coastal environments due to plate tectonic processes which can cause the land to rise/sink and sea level to increase/decrease: True.
- Plate tectonic is nothing but a process were both continental and oceanic plates starts drifting and converge or diverge with each other.
due to convergence of plate various landforms are formed such as Oceanic tench, fold mountains, volcanoes, etc .
- convrgence could occur between continent-continent , continent-ocean-ocean an continent-ocean plates.
due to divergence of plate boundaries multiple landforms are formed such as volcanoes , mid oceanic ridge , faulting, etc
due to folding and faulting nature, land gets rise or sink.
to know more about fold mountain click here
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Answer:
Paleomagnetism also provides evidence to support theories in plate tectonics. Because the ocean floor is mostly composed of basalt, an iron-rich substance containing minerals that align with the magnetic field, they record the alignment of the magnetic fields surrounding oceanic ridges.
