Answer:
1- Option (D)
2- FALSE
Explanation:
The seafloor spreading takes place because of the divergent plate motion. Alfred Wegener observed this motion of the seafloor and the continents but was not able to explain the main mechanism behind this until the new theory came into the picture. The divergent motion of seafloor and the motion of the continents were explained by the universally accepted theory known as the Plate tectonic theory. This theory was able to explain the mechanism behind this plate motion.
The study of the seafloor spreading provided some pieces of evidence that supported the continental drift theory. They gave a basic idea about how the oceanic plate gets subducted (consumed) at the convergent plate motion that undergoes partial melting at greater depth. As a result of which the magma rises up to the surface on the overriding plates.
The crust represents the outermost layer of the earth. They are of 2 types, namely the oceanic and the continental crust. These crusts when slide past one another in a transform plate boundary, it is neither created nor destroyed. It remains conserved.
Thus, the correct answers are given above and the second statement is false.
Answer:
1. 2004 tsunami
2. Mount St Helens 1980
3. Mount Pinatubo 1991
4. Kobe earthquake 1995
Explanation:
Mount St Helens 1980 is the most successful evacuation done because only Fifty-seven people died in this eruption while the rest of population were safely evacuated. Mount Pinatubo 1991 is a massive volcanic eruption that affected the provinces of Tarlac, Pampanga and Zambales in the Philippines. Due to Kobe earthquake 1995, most people is not able to go for work. 2004 tsunami occur due to the movement of the subduction zone in the interior region of the earth.
Answer:
Explanation:
One of the first scenario is that the rock might not contain minerals that would result in the formation of foliations and lineations in the rock.
The bulk of a rock fabric depends on mineral orientations and their unique properties. This is why platy minerals play very important roles in defining the fabric of a rock.
Another scenario is that, the rock might have exceeded the extreme of metamorphism where melting is approached. All fabrics will eventually fan out and be destroyed.
