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The geologic component layers of earth are at the following depths below the surface.
Section of the earth below the crust. Section of the earth s crust the earth s crust continental and oceanic is composed mainly of sedimentary metamorphic and igneous rock. The crust is composed of many different types of rocks that fall into three main categories. The crust the mantle and the core.
Metamorphic rocks rocks made from igneous or sedimentary rocks that have been subjected to high pressure and very high temperatures. Note that 1 starts at the surface of the earth and 6 ends at the center of the earth. The mantle is the layer of the earth that lies below the crust and is by far the largest layer making up 84 of earth s volume.
The crust is made of solid rock s and mineral s. Deep into the centre of the earth lies the earth s core consisting of a solid iron nickel alloy at extremely high temperatures about the same temperature as the surface of the sun. The layering of earth has been inferred indirectly using the time of travel of refracted and reflected seismic waves created by earthquakes.
The mantle starts at the mohorovicic discontinuity also known as the. The layer below the earth s crust is the mantle and below that are the outer core and inner core mantle is below the crustbelow the crust lies the mantle then the outer and inner core. Earth has three layers.
The crust is typically about 23 miles thick beneath continents and about 6 5 miles thick beneath oceans. The crust is made up of igneous metamorphic and sedimentary rocks and the entirety of the crust only makes up around 1 of the earth s volume. The mantle accounts for the bulk of the earth.
The earth s outermost layer of hard brittle rock is called the crust. Chemically earth can be divided into the crust upper mantle lower mantle outer core and inner core. Beneath the crust is the mantle which is also mostly solid rocks and minerals but punctuated by malleable areas of semi solid magma.
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