<span>In a volcano, you can observe a crack on the surface of the earth, from which molten lava comes out. The earth's crust basically breaks, and the high temperature and pressure melts the rocks present deep in the earth, which comes out during a volcanic eruption.</span>
Answer:
planetesimal assembly
Explanation:
The accretion model, also known as planetesimal assembly, is what gives us the perspective for the formation of the astronomical objects via the process of accretion. Some of the astronomical objects that are formed by this process are the galaxies, stars, planets,and moons. The process of accretion represents the accumulation of particles into an object by gravitationally attracting more and more matter, mostly gaseous matter, forming an accretion disk.
<span>The oldest rocks are Early Proterozoic metamorphic rocks</span>
