Containing everything from the ocean basins to continents, the crust is the outermost layer of the Earth. Overall, the crust makes up very little of the Earth's mass, so the other layers, which are the mantle, outer core and inner core, are much thicker.
Metamorphic, igneous and sedimentary rocks appear on the Earth's crust. At most, the crust's thickness is about 45 miles, and beneath that is a section of semi-solid rock, known as the mantle. Beneath the mantle is the Earth's outer core, which is a liquid layer of iron, and the inner core, which is a solid layer of iron and nickel under extreme pressure.Learn More
The outer core of the Earth begins about 1,800 miles below the Earth's surface and is between 1,370 and 1,430 miles thick. It is composed of liquid iron and nickel with some trace elements.Full Answer >
According to National Geographic, the outer core of the Earth is 2,300 kilometers (1,430 miles) thick. The outer core is mostly composed of iron and nickel and retains a temperature between 4,000 and 5,000 degrees Celsius.Full Answer >
The outer core, one of the three layers of the Earth, is approximately 1,430 miles (2,300 kilometers) thick and between 7,200 and 9,000 F. According to National Geographic, the outer core is mostly composed of iron and nickel in a liquid alloy form.Full Answer >
The Department of Earth and Ocean Sciences at the University of British Columbia defines geology as the study of the Earth and its composition, which includes the crust. A geologist covers everything from studying the times when dinosaurs roamed the Earth to predicting modern day earthquakes.Full Answer >