Olivine is a rock-forming mineral found in the crust, the mantle, and in some meteorites. Yosemite Glaciers: There are two active glaciers in Yosemite-but they are slowly melting away. Minerals: Information about ore minerals, gem materials and rock-forming minerals.
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The Earth's outermost layer of hard brittle rock is called the crust. The crust is typically about 23 miles thick beneath continents, and about 6.5 miles thick beneath oceans. … The crust is relatively light and brittle compared to other Earth layers. Most earthquakes occur within the crust.
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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 oceans(oceanic crust) and about 25 miles (32 kilometers) thick under the continents (continental crust).
http://volcano.oregonstate.edu/oldroot/education/vwlessons/lessons/Earths_layers/Earths_layers4.html
Oxygen is the most abundant element in rocks in Earth's crust, composing roughly 47 percent of the weight of all rock. The second most abundant element is silicon at 27 percent, followed by aluminum at 8 percent, iron at 5 percent, calcium at 4 percent, and sodium, potassium, and magnesium at about 2 percent each.
http://www.space.com/54-earth-history-composition-and-atmosphere.html
These two different types of crust are made up of different types of rock. The thin oceanic crust is composed of primarily of basalt and the thicker continental crust is composed primarily of granite. The low density of the thick continental crust allows it to float in high relief on the much higher density mantle below.
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The temperatures of the crust vary from air temperature on top to about 1600 degrees Fahrenheit (870 degrees Celcius) in the deepest parts of the crust. You can bake a loaf of bread in your oven at 350 degrees Fahrenheit, at 1600 degrees F. rocks begin to melt. The crust of the Earth is broken into many pieces called plates. The plates float on the soft, plastic mantle which is located below the crust.
http://volcano.oregonstate.edu/oldroot/education/vwlessons/lessons/Earths_layers/Earths_layers4.html
Earth's Core is thought to be composed mainly of an iron and nickel alloy. This composition is assumed based upon calculations of its density and upon the fact that many meteorites (which are thought to be portions of the interior of a planetary body) are iron-nickel alloys.
http://geology.com/nsta/earth-internal-structure.shtml
The crust is the upper layer of the earth. It is where the movement  of plates occur due to which earthquakes occur. The Earth's crust  is a thin layer of rock, like skin on … an apple.
http://www.answers.com/Q/What_is_the_size_of_the_earth%27s_crust
Cutting the earth we would see: 1) a very thin crust on the outside, 2) a core of significant size in the center, and 3) most of the mass of the Earth contained in the mantle.
http://geology.com/nsta/earth-internal-structure.shtml
It floats upon the softer, denser mantle. The crust is made up of solid material but this material is not the same everywhere. There is an Oceanic crust and a Continental crust. The first one is about 4-7 miles (6-11 km) thick and mainly consists of heavy rocks, like basalt. The Continental crust is thicker than the Oceanic crust, about 19 miles(30 km) thick. It is mainly made up of light material like granite.
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what is the size of the crust
The size of the crust is about 23 miles. The size of the Crust is about 23 miles.