Answer:
Partial melting occurs when only a portion of solid is melted. It is thus enriched in the chemical components of minerals with lower melting temperatures and the remaining unmelted portion of the rock is composed of minerals with highest melting temperatures. Partial melting preferentially enriches melts with incompatible elements.
Partially melted rock do not usually experience complete melting inside the Earth, due to their different chemical composition and their melting points.
It is thought that partial-melting processes play a major role in generating more-defined liquids from less-evolved ones, so that many basalts may be the result of partial melting in the upper mantle, and many granites may have derived partly or completely from the partial melting of continental crust (anatexis).With increasing temperature and pressure, the subducted oceanic crust (of basic composition) first undergoes metamorphism and then begins to melt or release watery fluids; this material rises into the overlying mantle, which may also begin to melt, giving rise to intermediate magma.
Raw materials earn less profit than finished goods.
Answer:
a
Explanation:
western Scandinavia is where Norway is located, known for its fjords
According to the article, jellyfish are invading the oceans near JAPAN. Fisherman in the area assert that the amount of fish and jellyfish in the waters have shifted drastically during their lifetime. There is a large abundance of jellyfish (making it difficult or impossible to fish some days) and a small number of other kinds of fish.
Humans may have caused this problem by over-fishing disrupting the balance of the underwater ecosystem. Jellyfish are eaten by some fish and compete with other species of fish. Also humans building docks, bridges, and other water infrastructures have led to a decline in habitat availability for jellyfish.
Pull-apart rift zones are generally associated with a divergent plate boundary.
<u>Explanation:</u>
In geology, rifts are those linear zones where lithosphere is getting pulled apart. Divergent plate boundary, also named as extensional boundary or constructive boundary is a linear characteristic that exist in between both the tectonic plates that tends to move away from each other.
Major rifts can be found alongside the central axis of mid-ocean ridges, where lithosphere and new oceanic crust is created between two tectonic plates in the path of a divergent boundary.
When the two plates pull apart, general faults or breakdowns are developed on both the sides of the rifts and the central blocks start to slide downwards thereby initiating the earthquakes.
