The crust of the Earth is composed of a great variety of igneous, metamorphic,
and sedimentary rocks. The crust is underlain ...
The Earth's Crust The first layer consists of about 10 miles (16km) of rock and
loose materials scientists call the crust. Underneath the continents, the crust is ...
May 29, 2015 ... From mud and clay to diamonds and coal, Earth's crust is composed of igneous,
metamorphic, and sedimentary rocks. The most abundant ...
The Earth's Crust is like the skin of an apple. It is very thin in comparison to the
other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the
In geology, a crust is the outermost layer of a planet. The crust of the Earth is
composed of a great variety of igneous, metamorphic, and sedimentary rocks.
Jan 16, 2016 ... The layers of Earth provide geologists and geophysicists clues to how Earth
formed, the layers that make up other planetary bodies, the source ...
Apr 7, 2005 ... Scientist said this week they had drilled into the lower section of Earth's crust for
the first time and were poised to break through to the mantle in ...
The Earth's crust is the thin, rocky layer that makes up our planet's shell. It is
exceptionally important, and not just because we live on it.
The chemical composition of Earth's crust, oceans, and atmosphere can be
studied, but this is only a minute fraction of the mass of Earth, and there are many