How thick is the earth s crust and what is the thickness of the earth s crust

The earth is made up of two parts: the outer sphere and the inner sphere. The outer sphere includes the atmosphere, hydrosphere, and biosphere; The inner sphere consists of three parts: the crust, the mantle and the core. The earth's crust is the outermost layer of the inner sphere, which is composed of weathered soil and hard rock, so the earth's crust can also be called the lithosphere.

The earth's crust occupies only one of the Earth's volume. If the mantle and core are compared to egg whites and yolks, then the earth's crust is like an eggshell.

The thickness of the earth's crust varies from place to place on the earth. Some places are thicker, such as the thickness of the Qinghai-Tibet Plateau in China, which can reach 60-80 kilometers; In some places, it is thinner, for example, the Atlantic basin is only 5-6 km thick, and the Pacific Ocean basin is about 8 km thick. The average thickness of the crust is about 33 kilometers, which is only one of the Earth's radius.

Although the earth's crust is thin, the material structure of its upper and lower layers is not the same. The upper part of the earth's crust is mainly composed of granite, which is less dense and has a lower specific gravity. Its main components are silicon and aluminum, so this layer is also called "silicon-aluminum layer".

The lower part of the earth's crust is mainly composed of basalts with higher density and heavier gravity. Its main components are magnesium, iron, and silicon, so this layer is also called the "silicon-magnesium layer". At the bottom of the ocean, because the earth's crust is already thin, there is generally only a silicon-aluminum layer and no silicon-magnesium layer.

In addition, in the uppermost layer of the earth's crust, there are sedimentary rocks, sedimentary metamorphic rocks and weathered soils of small thickness, which form the epidermis of the earth's crust.

The earth's crust is not static and immutable. In the long history of the earth, great changes have occurred from time to time. Continental drift, plate movements, volcanic eruptions, etc., are all manifestations of crustal movements.

The Earth's crust is also affected and eroded by the atmosphere, hydrosphere and biosphere, forming a crustal surface with a variety of different shapes and characteristics. Among them, soil is most closely related to human activities.

The interface between the earth's crust and the mantle, called the Moho plane, is named after the Yugoslav scientist Moholovich, who discovered it. On the Moho surface, the propagation velocity of ** waves changes dramatically, indicating a difference in density between the crust and mantle. The average thickness of the continental crust is 38 km, and the thickness of the oceanic crust is only 4 5 6 km.

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The earth's crust refers to a layer of solid crust composed of rocks on the Earth's surface, the thickness of which varies from 5 to 75 km, with an average of 17 km. Because the earth's crust is rich in silicon and aluminum, it is also called the "silicon-aluminum layer". According to its composition, it can be divided into upper and lower layers, and the composition of the upper layer is equivalent to granite, called granite layer, with average density; The composition of the lower layer is equivalent to basalt, called basalt layer, with an average density.

The surface layer of the earth's crust is formed by the accumulation of soil layer, weathered crust and sedimentary material due to the long-term action of atmosphere, water and organisms, and the thickness is between 0 10 km.

According to Sputnik, Mount Chimborazo in Ecuador, South America, is the thickest part of the earth's crust, and although it is only 6,310 meters above sea level, it is 2 kilometers closer to the center of the earth than the world's first peak, Mount Everest, because it is close to the equator, and the radius of the Earth's equator is longer than the radius of the poles. Scientists from Tokushima University have found that there is a north-to-south rift in the bottom of the Atlantic Ocean near South America, and its crust is kilometer thin at its thinnest point. So far, scientists have calculated that the average thickness of the earth's crust is about 17 kilometers.

How high the heart is. The earth's crust is as thick as it gets.

Haha, asking this kind of question is simply not knowing the height of the sky!

The average thickness of the Earth's crust is 17 kilometers.

The earth's crust is the outermost layer of the earth's solid surface structure, with an average thickness of about 17 kilometers, of which the continental crust is larger, with an average thickness of about 39-41 kilometers. The crust is thicker in the mountains and plateaus, up to 70 km; Plains and basins have relatively thin crusts. The oceanic crust is much thinner than the continental crust, only a few kilometers thick.

The Qinghai-Tibet Plateau is the thickest place on Earth, with a thickness of more than 70 kilometers. The crust in the submarine valley of the central Atlantic Ocean near the equator is only 1,000 meters thick; The crust of the abyssal trench in the eastern Mariana Islands in the Pacific Ocean is the thinnest and the thinnest crust on Earth.

The chemical composition of the upper layer of the earth's crust is mainly oxygen, silicon and aluminum, and the average chemical composition is similar to that of granite, which is called granite layer, and some people also call it "silicon-aluminum layer". This layer is thin at the bottom of the ocean, especially in the ocean basin floor, and even absent in the central Pacific Ocean, and is an uncontinuous circle.

The lower layer of the earth's crust is rich in silicon and magnesium, and the average chemical composition is similar to that of basalt, which is called the basalt layer, so some people call it the "silicon-magnesium layer" (another way of saying that the entire crust is a silicon-aluminum layer, because the aluminum content of the lower layer of the crust still exceeds that of magnesium; The rock part in the upper part of the mantle has a very high magnesium content, so it is called a silicon-magnesium layer); It is distributed in both continents and oceans, and is a continuous circle. The two floors are separated by a Conrad discontinuity.