Continental crust is less dense because of its composition. Continental crust is made up of felsic material (SiO4)-- mainly granite. The density of continental crust is 2.9 g/cm^3. Oceanic crust, while thinner, is made of mafic materials (Fe, Mg)-- mainly basalt. The density of oceanic...
Density:With an average density of about 2.7 grams per cubic centimeter, the continental crust is less dense than oceanic crust, which is why it "floats" higher on the mantle. Age:Continental crust contains some of the oldest rocks on Earth, with portions dating back over 4 billion years. ...
Thecontinental crustis older than the oceanic crust. This fact can be easily explained by the recycling process of theoceanic crust.The recycling process does not happen to the continental layer. Consequently, this ensures that the oceanic layer is always younger geologically. Location Becausecontinent...
Continental crust is older than oceanic crust because the subduction process that destroys the Earth's crust rarely destroys or recycles the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework and...
In general, compared with the oceanic crust, the continental crust is _. A. thinner B. thicker C. of the same thickness D. more liquid 相关知识点: 试题来源: 解析 B。解析:大陆地壳和大洋地壳在厚度上有明显差异。大陆地壳相对较厚,平均厚度约35千米,而大洋地壳较薄,平均厚度约7千米。这是因为...
Trench Island are Oceanic crust Continental crust Lithosphere Lithosphere Asthenosphere板块构造学说是20世纪最重要的科学成果之一,它科学地解释了地震、火山等地壳运动的机理.如图为某种类型的板块边界示意图.回答4-6题.以下地貌单元中,成因与图示机理相关的是( ) A. A. 东非大裂谷 B. B. 日本列岛 C. C....
Continental crust is found all across the world and makes up the continents and their continental shelves. What is the difference between the continental crust and the oceanic crust? Continental crust is thicker but less dense than oceanic crust. Continental crust has a higher content of silicon,...
Thin oceanic crust is formed by decompression melting of the upper mantle at mid-ocean ridges, but the origin of the thick and buoyant continental crust is enigmatic. Juvenile continental crust may form from magmas erupted above intra-oceanic subduction
Continental crust represents a layer of sedimentary, granite, and metamorphic rocks forming the Earth and the shallow seabed areas near shores. The oceanic crust is denser than the continental crust.Answer and Explanation: Continental crust recycling is a significant process occurring near subduction ...
Crust generated above the Iceland mantle plume: from continental rift to oceanic spreading center. Journal of Geophysical Research e Solid Earth 104, 22885e22902.Smallwood, J. R., Staples, R. K., Richardson, R. K. & White, R. S. 1999. Crust generated above the Iceland mantle plume: ...