The Asthenosphere
Published on Nov 18, 2015
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PRESENTATION OUTLINE
THE DIVISION OF EARTHS STRUCTURE LYING BENEATH THE LITHOSPHERE AT A DEPTH OF APPROXIMATELY 70KM/45MIN TO 260KM/160MILES.
IT IS SUPPOSEDLY SOFT, AND PARTIALLY MOLTEN LAYER.
EARTHS SURFACE MOVES TO PRODUCE THE MOTIONS OF PLATE TECTONICS.
LIFE EXPECTANCY OF A PLANET MUST BE ADDRESSED, MAGNETIC FIELD, POLARITY, AND VAN ALLEN BELT GENERATION.
IT'S TEMPERATURE IS NORMALLY BETWEEN 1,400 DEGREE CELSIUS TO 3,000 DEGREE CELCIUS.
IN CASE THE PRESSURE ON THE ASTHENOSPHERE GETS REDUCED BECAUSE OF MOVEMENT WITH PLATE TECTONICS,
THE MOLTEN MATTER RISING ABOVE, UNABLE TO ESCAPE, FORMS A PART OF THE LITHOSPHERE ITSELF
THE DENSITY OF THE ASTHENOSPHERE IS LESS THAN THAT OF THE LITHOSPHERE.
THE ASTHENOSPHERE IS CLOSER TO THE SURFACE OF THE EARTH IN OCEANS AND IS WITHIN A FEW KILOMETERS BELOW THE SURFACE
THE ASTHENOSPHERE IS THE VISCOUS, MECHANICALLY WEAK, DUCTILY-DEFORMING REGION OF THE UPPER MANTLE OF THE EARTH.
THE FLOWING ASTHENOSPHERE CARRIES THE LITHOSPHERE OF THE EARTH, INCLUDING THE CONTINENTS, ON IT'S BACK.
http://m.youtube.com/#/watch?v=ICIHgyNCDHw&desktop_uri=%2Fwatch%3Fv%3DICIHg...
SAMANTHA PAIGE-B BLOCK. FEB 6, 2013
Photo by mescon
