Answer:
Marine fossils found on landmasses.
Explanation:
Earth is an active planet, with tectonic plates that constantly move across the surface and cause changes in the distribution of physical features. The changes, in a most basic manner, can be seen in the creation of new continental masses and new ocean basins, and the destruction of continental masses and ocean basins.
The oceans we see at present have not been around forever, but they formed where plates have started to separate, while in meantime the preexisting oceans have suffered decline and eventual destruction because of it. An excellent example of where there were oceans in the past are the marine fossils. In many parts of the world that now are part of the continents, there is a huge number of marine fossils, even on mountain ranges like the Himalayas and Andes. This proves that in the past, these landmasses were part of an ocean, but because of uplift they have risen up and became part of the landmasses.
<span>Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs.
Source: OS</span>
I believe the answer is False
D.Vietnam. because of those places named the only place it runs through is Vietnam
Answer:
Density is one of the most factors that play a key role in plate tectonic activities. Some of the ways in which density is important in the field of plate tectonics are as follows-
- The convergent plate boundaries are responsible for the creation of a subduction zone, where the high-density lithospheric plate subducts below the less dense one. It is because the heavier plate is comprised of heavy minerals thereby forming heavier rocks as a result of which its density increases. Due to these differences in density, there occurs a subduction zone.
- The divergent plate boundary forms where two plates move away from one another. This type of plate motion is responsible for the eruption of magma on the seafloor. As the plates diverge, the lithosphere becomes eventually thin, and with more progressive spreading, the magma comes out to the seafloor. This is because the hot magma is less dense, and forms convection cells as they rise upward. This is how the density helps in the upwelling of magma at the mid-oceanic ridge in a divergent plate boundary.
- When there collide two plates of equal densities, then it gives rise to the formation of huge mountains, because neither of them is heavy to get sink. So it uplifts the crust, forming a sandwich-type pattern.
