It often collects in underground space, and can finally come out from volca-noes.Finally, there's the earth's thin outer crust(地壳). There are two types of crust: the conti-nental(大陆) crust and the oceanic crust. The thinnest parts of the crust are under the oceans and go to a...
What crust is the Eurasian Plate made of? What tectonic plate is primarily comprised of seafloor crust? How many layers are in the Earth's crust? What is the oceanic crust always doing? What type of rock is found under the continents?
The divergent boundary is responsible for creating a new oceanic crust. A divergent boundary arises when two tectonic plates separate or move apart...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 homew...
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 5...
earth experiences volcanic activity, molten hot iron and silicate lava rocks spew through the volcanic openings in the ocean's floor. These rocks are also rich in magnesium. When the lava cools, it solidifies as basalt which makes up the oceanic crust, a large part of the earth's surface...
He published his finding in a 1919 journal — the first person to introduce the idea that there is a sharp boundary made up of a different material that separates the superior crust from the mantle beneath it. It's now known as the Mohorovicic discontinuity. How Deep Is Mohorovicic Discontinu...
What are the best natural analogues for former subducted oceanic crust?Not Availabledoi:10.1016/j.gca.2006.06.1309ZackT.Elsevier LtdGeochimica Et Cosmochimica Acta
For example, ocean pH depends to a large extent on atmospheric carbon dioxide (CO2), which, in turn, is influenced by a variety of other factors. The concentration of CO2decreases, for instance, as a result of its chemical reaction with continents, deep-sea oceanic crust — and its eventua...
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...
Eclogite:Can be brought up through orogenic (mountain-building) processes where subducted oceanic crust is pushed into the mantle, then later exhumed or brought up by tectonic uplift. Peridotite:Sometimes reaches the surface through processes like serpentinization (hydration of olivine into serpentine) ...