What is continental crust composed of? What is oceanic crust composed of? What are the layers of the Earth's crust? Which layer of the Earth contains the crust? What does the crust do for the Earth? How many elements make up the majority of Earth's continental crust?
How much copper is in the Earth's crust? Where is the Earth's crust the thinnest? How did the Earth's crust form? What are the characteristics of the Earth's crust, mantle, and core? What moderates Earth's temperature? How old is the oceanic crust?
If the speed of the current is 1.5 km/h. what is speed of the boat in still water? (A) 2.5 km/h (B) 3.5 km/h (C) 5.3 km/h (D) 4.3 km/h View Solution Knowledge Check What is the mean thickness of oceanic crust? (1) 5 km (2) 30 km (3) 10 km (4) 70 km A1....
A. New oceanic crust is formed B. Volcanic eruptions are less likely to occur C. One tectonic plate is subducted beneath another D. There is a large amount of sediment deposition 相关知识点: 试题来源: 解析 C。解析:海沟是海洋中非常深的区域,在海沟附近通常会发生一个板块俯冲到另一个板块之下...
into and through the other plate, solidifying into new crust. Magma formed from melting plates solidifies into granite, a light colored, low-density rock that makes up the continents. Thus at convergent boundaries, continental crust, made of granite, is created, and oceanic crust is destroyed....
Sial stands for Silicate (Si) and Aluminum (Al) which are the two most abundant minerals in the Earth's continental crust. The oceanic crust is called Sima (short for silicate and magnesium). Sima is often only 5 to 10km thick while sial can be up to 70km thick. Sial is also less ...
The surface of the earth can be divided into the continental crust and the oceanic crust. The continental crust is made mostly of granite while the oceanic crust is made of basalt. The average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is ...
lithospheres, with thicknesses depending upon the physical or chemical characteristics that define them: We live on a highly dynamic Earth whose stony outer portion participates in a massive convection of matter that continually builds, destroys and moves plates of continental and oceanic crust.doi...
Most volcanism on the planet, including the formation of volcanoes and volcanic eruptions, occurs along the mid-ocean ridge, where the new oceanic crust is born, made of lavas and sediments. Over the years, these mid-ocean ridges might be responsible for a lot of undersea and sea-surface ca...
While the Earth is estimated to be4.54 billion years old, oceanic crust is constantly recycled at subduction zones. That means the oldest seafloor is still onlyabout 340 million years old. The oldest ocean rocks are found in the northwestern Pacific Ocean and the eastern Mediterranean Sea. Fragme...