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Don't Eat the Earth's CRUST ... The Earth's outermost surface is called the crust. The crust is typically about 25 miles thick beneath continents, and about 6.5 miles thick beneath oceans. The crust is relatively light and brittle. Most earthquakes occur within the crust.
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www.thetech.org/exhibits_events/online/quakes/inside/cr...
www.thetech.org/exhibits_events/online/quakes/inside/crust.html
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We present a new contour map of the thickness of the Earth's crust. We use a 10 km contour interval plus the 45 km contour. This contour map was created directly from the 5 deg. by 5 deg. gridded crustal model CRUST 5.1 (Mooney et al., 1998) plus complementary information.
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earthquake.usgs.gov/research/structure/crust/index.php
earthquake.usgs.gov/research/structure/crust/index.php
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Exploring the Earth's Crust ... The nearby crust of the Earth can be explored in great detail with echo-sounding techniques, a kind of acoustic radar. These methods give images in cross section very similar to hospital sonograms: (J. Louie;
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www.seismo.unr.edu/ftp/pub/louie/class/100/interior.htm...
www.seismo.unr.edu/ftp/pub/louie/class/100/interior.html
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The Earth is the third planet from the sun in our solar system. ... Surface and crust: The Earth's surface is composed mostly of water, basalt and granite. Oceans cover about 70% of Earth's surface. These oceans are up to 3.7 km deep. The Earth's thin, rocky crust is composed of silicon, aluminum, calcium, sodium and potassium.
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www.enchantedlearning.com/subjects/astronomy/planets/ea...
www.enchantedlearning.com/subjects/astronomy/planets/earth/Inside.shtml
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Although it feels solid and hard beneath our feet, the outer surface of the Earth is a thin crust of fragile rock, fractured like the cracked shell of an egg.
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www.pbs.org/wnet/savageearth/hellscrust/index.html
www.pbs.org/wnet/savageearth/hellscrust/index.html
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Below: This view drawn to scale demonstrates that the Earth's crust literally is only skin deep. Below right: A view not drawn to scale to show the Earth's three main layers (crust, mantle, and core) in more detail (see text).;
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pubs.usgs.gov/publications/text/inside.html
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Discovery supports theory that Earth is a giant recycling machine. ... The discovery supports the theory that Earth's crust is constantly recycled deep into the planet as molten material from below simultaneously pushes up to refresh the surface.
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www.livescience.com/environment/060517_inside_earth.htm...
www.livescience.com/environment/060517_inside_earth.html
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; Periodic table of the elements with the common elements from the Earth's crust highlighted with white. Click on image for full size ( 15K GIF); L.Gardiner/Windows to the Universe...
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www.windows.ucar.edu/tour/link=/earth/geology/crust_ele...
www.windows.ucar.edu/tour/link=/earth/geology/crust_elements.html
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First...
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www.wappingersschools.org/RCK/Pages/Science/EScience/We...
www.wappingersschools.org/RCK/Pages/Science/EScience/WebShows/Sedrox/sld002.htm
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