0
All depths are from the surface of the Earth. The Crust--The outer skin of the planet is composed of igneous, metamorphic, and sedimentary rock. Continental Crust: Comprised predominately of rocks most resembling granite, the continental crust is relatively thick compared to the oceanic crust with a depth that ranges from 30 km to 50 km. The average specific gravity of continental crustal rock is 2.7. Oceanic Crust: At an average depth of 5 km to 10 km, the oceanic crust is thinner than the continental crust. Oceanic crustal rocks are composed mainly of the igneous rocks basalt, diabase, and gabbro, which are mafic in composition. The average specific gravity of oceanic crustal rock is 2.9. Lithosphere: See below. The Mantle--The layer directly below the crust which is delineated from the crust by the Mohorovicic Discontinuity, where seismic waves increase in velocity. The division between the mantle and the crust is a chemical one, the rocks and constituent minerals being higher in magnesium and lower in silicon and aluminum than crustal rocks. The mantle comprises 84% of Earth's volume. Upper Mantle:Lithosphere: The uppermost mantle consists of hard rock and is attached to the crust and comprises the lithosphere. The lithosphere is comprised of tectonic plates which 'float' independently of each other. The lithosphere contains more mantle than crust. Oceanic lithosphere ranges from 50 km to 100 km in thickness, and continental lithosphere ranges from 40 km to 200 km. Asthenosphere: Just below the lithosphere lies the asthenosphere, an area of highly viscous but solid rock. Its viscosity allow it to move slowly over time, which it does as it transfers heat to the lithosphere via convection currents. These convection currents are responsible for the movement of Earth's tectonic plates. The depth of the asthenosphere averages somewhere between 100 km and 200km with depths up to 410 km. Transition Zone: The depth of the transition zone is between 410 km and 660 km. The rock here is mostly peridotite, a coarse grained igneous rock, kept from melting by extremely high lithostatic temperatures. Temperatures in the transition zone range from 1400 degrees C to 1600 degrees C. The Lower Mantle: The depth of the lower mantle ranges from 670 km to 2798 km. Little is known about the lower mantle other than that seismic waves indicate it is fairly homogenous in lithology. D'': The D'' area of the mantle extends from 2798 km to 2900 km, which is the boundary between the mantle and the liquid outer core. At this level, the pressures are enormous, roughly equal to 1.4 million units of atmospheric pressure, and temperatures are over 4,000 degrees C. The Outer Core: The outer core lies at a depth from 2900 km to 5150 km. It's composed of liquid iron and nickel along with small amounts of lighter elements, with temperatures ranging from 4,000 degrees C to 6,100 degrees C near the boundary with the inner core. The Inner Core: From the boundary with the outer core to the center of the Earth, a distance of about 1220 km is the solid sphere of the inner core, a ball of incredibly hot iron-nickel alloy. Temperatures here reach between 5,000 and 7,000 degrees C, and pressures are calculated to be around 3,000,000 units of atmospheric pressure. Despite the high temperature, at these pressures the metals cannot remain molten.
What else can I help you with?
What is the special lines in globe?
Special lines in Globe Telecom may refer to dedicated customer service hotlines for specific concerns such as billing inquiries, technical support, or account management. These special lines are designed to provide more focused assistance for customers who may need help with a particular issue.
What are the lines that run horizontally CIRCLING the globe?
no
What are two names for the lines that run east to west on a globe?
They are the lines of latitude, and they are also called parallels.
What is another name for the lines that run across the globe east-west called besides latitude?
The lines on the globe are not called "latitude", any more than the marks on a thermometer are called "temperature". The lines on the globe that mark intervals of latitude are called "parallels" of latitude.
What are the imaginary lines on the globe and map?
The horizontal lines are called latitudes and the vertical lines are called longitudes.
What is the special lines in globe?
Special lines in Globe Telecom may refer to dedicated customer service hotlines for specific concerns such as billing inquiries, technical support, or account management. These special lines are designed to provide more focused assistance for customers who may need help with a particular issue.
What are the lines on the globe that look like a checkerboard called?
the lines on the globe are called longitude and latitude lines the longitude lines go up and down while the latitude lines go left to right
What globe lines that are always the same distance apart?
"Parallels" of latitude. Those are the lines that are drawn horizontal on the globe or map.
What is latuide?
the horazontal lines on a globe
In what way can the imaginary lines on the globe help?
The imaginary lines on the globe helps because it divides the Northern Hemisphere from Southern Hemisphere. Therefore, imaginary lines are helpful.
Do the lines of measure the distance north and south or east and west on the globe?
The lines of latitude on a globe measure the distance east and west.
Are the parallel lines on a globe called longitude or latitude lines?
Latitude.
How many lines of latitude are on the globe?
there are 36 lines of latitude respectively
Why there is an imaginary lines on globe?
Those lines are called longitude and latitude.
Imaginary line around the earth?
There are several. They are called lines of longitude and latitude which help people locate where they are on the globe. There are also some other, special lines such as the Equator, the Prime Meridian, and the International Date Line.
The horizontal lines are called the lines of what?
On the globe they are called lines of LATITUDE and are parallel to the equator.
What is the pattern of lines that circle the globe east-west and north-south called?
The pattern of lines that circle the globe east-west are called lines of latitude, while the lines that circle the globe north-south are called lines of longitude. Together, they form a grid system that helps in locating points on the Earth's surface.
