ü  H	TABLE 7-1	Metamorphic Zones and Their Mineral Assemblages		@
		for Different Country	Rock Types	
	Metamorphic Zone for Clay-Rich	Mineral Assemblage Produced for Different Country Rocks		
Metamorphic				
Grade	Rocks	Mudrocks	Limestones	Mafic Igneous Rocks
Increasing	Chlorite	Chlorite,* quartz,		
Low	Biotite	muscovite, plagioclase Biotite,* quartz, plagioclase	Chlorite,* calcite or dolomite, plagioclase	Chlorite,* plagioclase
Medium	Garnet	Gamet,* mica, quartz,	Garnet,* epidote,	Garnet,* chlorite,
		plagioclase	hornblende, calcite	epidote, plagioclase
1	Staurolite	Staurolite,* mica, garnet, quartz, plagioclase	Garnet, hornblende,*	
T   High	Kyanite	Kyanite,* mica, garnet, quartz, plagioclase	plagioclase	
metamorphism				Hornblende,* plagioclase
	Sillimanite	Sillimanite,* garnet, mica, quartz, plagioclase	Gamet, augite,* plagioclase	
Outer zone of spotted slates
Inner
andalusite-cordierite hornfels zone
£> FIGURE 7-6 A meteraorphic
intermediate zone    aureole typically surrounds igneous with some biotite                          .rI_                      ^                i
intrusions. The metamorpmc aureole
around this idealized granite batbolith
contains three zones of mineral
assemblages reflecting the decreases in
temperature with distance from the
intrusion. An andalusite- cordierite
hornfels forms the inner zone adjacent
to the batholith. This is followed by an
intermediate zone of extensive
recrystallization in which some biotite
develops, and farthest from the intrusion
is the outer zone, which is characterized
by spotted slates.
03
I
16
14-
_
12-í
10 8-6-4-2
0
Blueschist
Eclogite

r
Lší
\
í
Granulite
#
/ Pumpeüyite   /    $
Zeolite
^      /
m *
/
SanicJínite
-55
-  50
-  45
-  40 35
-30 -25 -20
-  15
-  10
-  5
~i   i  T" T"  i   i   i   i 100 200 300 400 500 600 700 800 900 1000
0
Temperature (°C)
E
M
sz
-t-j
(D
Q
^ FIGURE 7-19 A pressure-temperature diagram showing where various metamorphu: facies occur. A facies is characterized by a particular mineral assemblage that formed under the same broad temperature-pressure conditions. Each facies is named after its most characteristic rock or mineral.
Ž> FIGURE 13-4 Stress and possible types of resulting deformation, (a) Compression causes shortening ot rock layers by folding or faulting. (6) Tension lengthens rock layers and causes faulting. (c) Shear stress causes deformation by displacement along closely spaced planes.
^ FIGURE I3-II   Sy neline and anticline showing the axial plane, axis, and fold limbs.
Axial
Syncline             Anticline