Page 331 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

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Earth Time the state at near the center time; the average Time since Earth formed (million years) 1 years formation, of time one would setting,

the molten temperature at about surface billion 4.6 his of its the from it microwave enough
Heat Within o == MOld 186} a Earth (T,),in highest is temperature of a potato suggests the time since loss, the Earth’s near about is Earth both because since heat new conduction. as at originated decay elements analogy, above the a in it placing low a On

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temperature of the temperature drops throughout: it flowing across the surface also decreases through Earth. age of the 3% pb (9.) eoeynsgns mojeys heat or convective temperature the that reveal low was estimate generating well as convection heat Earth’s of radioactive Continuing and oven potato. the within
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a) Original the to estimate F<BSR a) The surface new heat generation average the techniques age Kelvin’s been has Earth through all Not when produced mantle. Earth’s normal the from heat new

through time. the surface, the through rate of heat Kelvin by §< Time since potato removed (minutes) oven Loss of heat through conduction. Similarly, 10.4b). (Fig. dating million. the surface the Decay is heat in primarily potato excite would

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10.3 formation. b) As heat decreases outward (to T;).c) The across the surface was thus used 8 8 o° es 10.4 Earth's age.
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regions of Earth’s surface. a) temperature distribution Heat production. New heat rocks conduct more heat another through convection. to 1965). Elder, original of the by time over estimated Kelvin measurements of of all that were heat that state, and be can model (Fig. counter kitchen they hot, is potato last the few oven the of o

flows across different original the part, to time. b) mantle and continental crust. c) Conduction. from one region deeper mantle (see the in combined effects produced heat century, William on based assumptions molten a simple the on it the that within recently, had it

‘ through the new and decay) years, from conduction. This laying feel and very conjecture
heat is due, in Earth cools interior to it’s colder surface. Locally, some transferred to 19th million Kelvin’s cool to and oven might
that regions Earth's due is radioactive the 40 oven kitchen the
rate upper part of the asthenosphere and heat of formation) In and 10.3). began through an the of potato
Flow the for all Large amounts of heat can be EARTH 20 (Fig. Earth out of enter out

Heat factors influence level of heat temperature decreases as internal (heat through Formation between surface the Earth to taken cold a
—_ of radioactive decay, primarily within Earth’s hot THE of Earth’s Earth (primarily of as its when the of potato were was touching
Chapter10 Several background overall Convection. WITHIN Heat of of the Heat Earth across originated out hot a If someone it that person

a 10.2 A (T). The conducts outward, from Convection can occur in the HEAT Sources Most ture itself the ing ferred taking son
312 FIGURE formation. Earth product others. d)