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.
Answer: "hydrologic cycle" .
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Answer:
extrusive rocks.
Explanation:
When an igneous rock contains large crystals of minerals surrounded by the fine grained or glassy material (set in a matrix of glassy part).The texture is known as Porphyritic texture and the large crystals are known as Phenocrystals and the fine grained or glassy part is called as Ground mass.
When this Porphyritic texture showing igneous rocks are known as Porphyrites. The texture is largely found in volcanic and hypabassal rocks so these rocks are the extrusive rocks.
Answer:
Sudans many years of civil war have resulted from conflicts between "Muslim Arabs, and Christian and animist Africans.
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Explanation:
Religion is the essential effect in Sudan’s civil war. The North, with most of Sudan's land and inhabitants, is Muslim and Arabic-speaking, and their religion and language are both important for their individuality. On the other hand, the South´s individuality is indigenously African, with Christian and Western influences. Sudan's first civil war was fought between the Arab-led Khartoum government in the north and rebels in the largely Christian and animist south. Southern rebels were fighting for regional autonomy and representation in the government. A peace agreement was signed in 1972 that granted semi-autonomy to the south.
