Page 330 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

time of its
flow
(T,) and
313
=>
heat
time; the average
Time
the
near the center
Earth
state at
the
molten
Heat Within
highest
flowing across the surface also decreases through
== MOld 186}
o
a
Earth (T,),in
is
temperature drops throughout: it

8
8
3%
temperature of the
Earth.
(9.) eoeynsgns mojeys
$,yurez jo eunjesedwe
pb
age of the

the
a) Original
to estimate
the surface, the
through time.
rate of heat
Kelvin
through
by
decreases outward (to T;).c) The
across the surface was thus used
Cooling of Earth
lost
is
formation. b) As heat
ojeiog ion |
10.3
8
FIGURE
(9.) e08pNS s,0}BI0d Jo esmBEdWweL
a
Heat of 8 of the by- is a Heat generally than readily o° F<BSR §< &€& 2 es Time since Earth formed Time since potato removed (million years) (minutes) oven from potato was the temperature of a potato suggests the time since a) The surface Loss of heat through conduction. 10.4 FIGURE km depth 1 temperature at about loss
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)