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

Heroic nature. Taibao.

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.

Xiaoyankan Technology: How thick can the earth's crust be? The average thickness is only 17 km! The thickest in China.

The average thickness is about 17 km.

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 part of the Mariana Islands in the Pacific Ocean is the thinnest and the thinnest on Earth.

The chemical composition of the upper layer 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 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 earth's 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.

1. The earth's crust is a thin layer of crust on the earth's surface.

Its thickness is roughly the radius of the Earth.

of 1,400, but the thickness varies from place to place, with the continental part averaging more than 37 km and the oceanic part only about 7 km thick. Generally speaking, the crust of high mountains and plateaus is the thickest, such as the Qinghai-Tibet Plateau in China.

The Earth's crust can be up to 70 km thick.

2. Mantle. Earth's crust and core.

between the middle layers. The average thickness is:

More than one kilometer. 1914, BGutenberg measured the depth of the interface between the Earth's core and the mantle at 2,900 km, which is quite accurate and is only 15 km short of the newly calculated value. The mantle is further divided into the upper mantle (

350 km deep) and the lower mantle. There is a low-velocity layer of ** waves in the upper mantle, and the low-velocity layer is above the relatively hard top of the upper mantle. The top of the upper mantle and the earth's crust are often referred to as the lithosphere.

The global lithospheric plates make up the outermost structure of the earth, and the tectonic movement of the earth's surface is mainly carried out within the lithosphere.

3. The Earth's core. The core part of the earth is mainly made of iron.

Nickel element. Compose.

The radius is 3480 km.

Year. i.According to the longitudinal wave passing through the earth's core, Lyman proposed that there is a sub-interface in the earth's core, and the earth's core is divided into two parts: the outer core and the inner core. Since the outer nucleus cannot allow transverse waves to pass through, it is inferred that the state of matter of the outer nucleus is liquid.

The average thickness of the continental crust is 35 km. Continental crust is also known as continental crust or continental crust. Covering 45% of the Earth's surface, it is mainly manifested by continents, continental marginal seas, and smaller shallow seas.

It is one of the two major types of crust (its counterpart is the "oceanic crust").

Introduction: The chemical composition of the earth's crust is characterized by silice-aluminum, which can be divided into two types of rocks: one is the relatively undeformed sedimentary rocks in the upper part of the earth's crust.

or volcanic rock accumulation, and the other type is sedimentary rocks and igneous rocks that have been deformed and metamorphized.

and metamorphic rock belts. The latter make up the mountains on the earth's surface or in the deep part of the earth's crust, while the former is mostly found in basins and their edges on the surface of the earth's crust. The earth's crust can withstand strong plate tectonic movements, so only 3.8 billion years ago can be found.

Main features: Continental crust refers to the part of the continent that is mainly distributed on the continent and submerged by sea water (continental shelf.

Continental slopes and inland seas.

of the earth's crust. Its structure is much more complex than that of the oceanic crust. It consists of sedimentary rock layers, silicon-aluminium and silicon-magnesium layers from top to bottom, with an average thickness of 35 km, but very uneven.

The thickness is small in the tectonically stable zone, but increases sharply in the tectonically active zone, and the maximum thickness can reach 60 70 km in the high mountainous areas, such as the Qinghai-Tibet Plateau in China.

area, up to 70 to 80km. Although the island arc is in the ocean, its crustal nature is similar to that of a continental type, so some people say that it is a transitional crust. In the upper part of the continental crust, the average density is , and the velocity of the longitudinal waves is here.