Crust
The crust is very thin in comparison to the other layers of the earth. The crust is only 3 miles thick under the oceans and about 40 miles thick under the highest mountain chains. The layer of the earth under the crust is called the mantle. It is over 1800 miles thick!! The crust and the upper level of the mantle form a layer of the earth that moves very slowly (1-4 inches per year). This layer that moves and causes earthquakes and volcanoes is called the Lithosphere. Layers of the Earth. The earth is made up of layers (crust, mantle, outer core, and inner core). Each one has a unique make-up to it. Crust. This is the outer layer of the Earth about 10 miles or so thick. Mostly made up of rock and loose material. The crust found underneath continents is 3 times thicker than the crust underneath the oceans. The first 50 miles of the mantle are believed to consist of very hard rigid rock. The next 150 miles or so is believed to be super-heated solid rock. Below that for the next several hundred miles, the Earth mantle is once again made up of very solid and sturdy rock materials. 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). Notice how thin the crust of the Earth is in comparison to the other layers. The seven continents and ocean plates basically float across the mantle which is composed of much hotter and denser material. The crust is composed of two basic rock types granite and basalt. The asthenosphere is the part of the mantle that flows and moves the plates of the Earth. The Mantle. The mantle is the layer located directly under the sima. It is the largest layer of the Earth, 1800 miles thick. The mantle is composed of very hot, dense rock. This layer of rock even flows like asphalt under a heavy weight. Notice how thin the crust of the Earth is in comparison to the other layers. The seven continents and ocean plates basically float across the mantle which is composed of much hotter and denser material. The crust is composed of two basic rock types granite and basalt. The outermost layer of the Earth is the crust. It is like the peel of an apple. It is very thin compared to the other layers. The crust is only about 3-5 miles (8 km) thick under the oceans (oceanic crust) and about 25 miles (32 km) thick under the continents (continental crust). The crust is made up of mainly silicate rocks (about 85%). Continental crust is mostly granite while oceanic crust is basal FIND OUT MORE. The Earth is covered in a layer of solid rock called the crust. Rocks are either SEDIMENTARY, IGNEOUS, or METAMORPHIC. Almost all rocks made of minerals, but different rocks contain different mixtures of minerals. Granite, for example, consists of quartz, feldspar, and mica.  The crust is the outer hard layer of the Earth, and is less than 1% of Earth's volume. The crust is made up of different types of rocks; igneous, metamorphic, and sedimentary rocks. Below the crust is the mantle. The upper part of the mantle is made up of Peridotite, a rock denser than rocks common in the crust.  Grade 7 Earth's Layers. The crust layer is made up of the continental crust and the oceanic crust. The continental crust is composed mostly of dense rocks like basalt. The oceanic crust is mainly less-dense rocks such as granite.  Mantle. The next layer beneath the crust is called the mantle. It extends to a depth of approximately 1,800 miles and is made of a thick solid rocky substance that represents about 85% of the total weight and mass of the Earth. The first 50 miles of the mantle are believed to consist of very hard rigid rock. The next 150 miles or so is believed to be super-heated solid rock. Below that for the next several hundred miles, the Earth mantle is once again made up of very solid and sturdy rock materials.
http://volcano.oregonstate.edu/rock-lesson-works http://staff.orecity.k12.or.us/jeremy.hill/Jeremy_Hill/Layers_of_the_Earth_Notes.html http://volcano.oregonstate.edu/earths-layers-lesson-1 http://volcano.oregonstate.edu/earths-layers-lesson-1 http://centralpt.com/upload/407/4769_layers%20of%20earth.pdf http://www.factmonster.com/dk/science/encyclopedia/rocks.html https://simple.wikipedia.org/wiki/Earth%27s_crust http://www.helpteaching.com/questions/186475/the-crust-layer-is-made-up-of-the-continental-crust-and-the- http://staff.orecity.k12.or.us/jeremy.hill/Jeremy_Hill/Layers_of_the_Earth_Notes.html
which layer of the earth is made mostly of granite and rocks