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School
Georgia Southern University *
*We aren’t endorsed by this school
Course
1121
Subject
Geology
Date
Jan 9, 2024
Type
Pages
6
Uploaded by ajbrown2219
Questions
A.
Forming
Unconformities
1.
The
panels
in
Figure
6
below
represent
the
sequential
formation
of
a
nonconformity.
List
the
panels
in
their
correct
order
from
oldest
to
youngest.
C
(youngest)
Figure
6.
Nonconformity
sequence
puzzle.
2.
The
panels
in
Figure
7
below
represent
the
sequential
formation
of
an
angular
unconformity.
List
the
panels
in
their
correct
order
from
oldest
to
youngest.
Figure
7.
Angular
unconformity
sequence
puzzle.
3.
The
panels
in
Figure
8
below
r
their
correct
order
from
oldest
epresent
the
sequential
formation
of
a
disconformity.
List
the
panels
in
to
youngest.
(oldest
JV
')
I\
\-
\
-
g
~—
(youngest)
Figure
8.
Disconformity
sequence
puzzle.
B.
Sequence
of
Events
Diagrams
4.
A
geologic
sequence
diagram
is
a
geologic
cross-section
where
the
relative
determined.
Using
the
six
geologic
principles
from
above,
determine
the
rel
units
for
the
following
cross
section.
order
of
events
has
been
ative
ages
of
the
rock
Youngest
Figure
9.
A
simplified
geologic
cross-section.
Unit
R
is
an
igneous
intrusion
with
a
"bake
zone"
(stippling).
Geologic
History
of
Lava
Canyon
Let'g
use
some
relative
dating
concepts
to
reconstruct
the
geologic
history
of
Lava
Canyon.
Use
the
Key
to
Fill
Patterns
to
Rock
Units
at
the
back
of
this
lab
to
answer
the
following
questions
Figure
10.
The
Lava
Canyon
sequence
diagram.
5.
Determine
the
relative
sequence
of
ages
(oldest
to
youngest)
of
the
rock
units
in
Figure
10.
Label
the
titling
as
T1.
Do
not
include
the
unconformities
X,
Y,
and
Z.
"\
1
-
1
X
\
‘\‘\
|
s
(
\
\\
T
\
\
(oldesty
T\
Y=
-
.
(younges?)
a.
Which
type
of
unconformity
is
Z?
RO\
)
(N
TR
i\,
7\“\,
AT
b.
Which
type
of
unconformity
is
Y?
__
\\
(OVINER
_T_\mlf
B0
L
R
¢.
Which
type
of
unconformity
is
X?
__
L\
\\_\,\.L_
o
SR
Nl
NN
G
d.
Which
type
of
metamorphic
rock
formed
in
the
baked
zone
at
Unit
G?
_A__,hLIA;_L"_L
/o
e.
Which
geologic
principle
allowed
you
to
determine
the
relative
ages
of
units
K-C
and
S-F?
©
v
2
|
\
/
\‘,
\
/\\
\(
O
\\\\\\
)
\\\\\\
ik
gt
\
f.
Explain
in
one
complete
sentence
why
Unit
D
is
younger.
than
all
the
other
rock
unnts
\y\\\u‘*\"
(\\\‘\x‘-‘\'
g.
|fintrusion
M
was
dated
to
be
38
Ma
and
intrusion
T
was
dated
to
be
26
Ma,
then:
-
How
oldis
layer
A?
Older
than
38
Ma
267to
38
Ma™
Younger
than
26
Ma
-
When
did
tilting
of
layers
H-C
occur?
Before
38
Ma
26
to
38
Ma
K
Aflem‘\‘
I
R
R
R
R
R
R
R R R
R
R
R
R
R
R
R
R
O
R
O
R
RO
R
R
R
R
R
R R
R
R
R
R
R
RRRRERESRDRDRERERED
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Geologic
History
of
Rhyolite
Cliffs
Rhyolite
Figure
11.
Cross
section
of
Lava
Canyon.
6.
Determine
the
sequence
of
events
(oldest
to
youngest).
Include
the
titling
as
T1.
Do
not
include
the
unconformities
X,
Y,
and
Z.
a.
Match
Units
D,
L,
and
T
with
the
correct
igneous
structure
sill
\
b
dike:
__
L_
e
lava
flow:
.
b.
Unconformity
Xis
a(n)
__
&
"
"\
X
R
s
Y
TN
o
3
X
¢.
Unconformity
Y
is
a(n)
_CANONON
N
L\
\
AR
Es
d.
UnconformityZisa(n)
YOV
ARPETSCRIEN
Vst
U
e.
What
is
the
name
of
the
metamorphic
rock
formed
in
the
baked
zone
within
layer
A?
In
the
space
below,
discuss
the
geologic
history
of
Rhyolite
Cliffs
from
the
previous
page.
Use
bullet
points.
Don't
just
write
what
was
deposited.
Discuss
geologic
processes
(tfransgression
regression,
tilting,
mountain-building,
erosion,
formation
of
unconformities,
etc.),
as
well
as
the
ages
of
rock
units
and
events
in
relative
and
absolute
terms
based
on
the
ages
given.
In
this
part
of
the
lab
|
want
you
to
be
detailed.
You
need
to
pull
from
everything
you've
leamed
in
class
thus
far.
o
ENCY
Gy
e
WCVErS
&
o
L
1
ECWSIBERIRAL
B
€
e
R
Geologic
History
of
Faultline
Canyon
Faultline
Canyon
Figure
12.
Geologic
cross-section
for
the
Faultiine
Canyon
area.
youngest).
Include
the
fault
(Z)
and
the
folding
of
Determine
the
sequence
of
events
(oldest
to
formities
X
and
Y.
layers
G-A
(F1).
Do
not
include
the
uncon
-
\
-
~
(oldest)
L
}_L
,,L,
G
,&_
e\l
O
L
\}
(youngest
a.
Which
type
of
unconformity
is
XPEEE(
A
,_l
)
Ch
\
b
b.
Which
type
of
fold
is
shown
in
this
cross
section?
(Anticline)
Syncline
Overturned
Which
type
of
intrusive
igneous
structure
is
M?
7&_‘
\
}
-
d.
Which
type
of
fault
is
Z?
_J_\“‘,,\A\m\,\_l
A
\
Age
of
volcanic
units:
M
=
14
Ma,
C
=80
Ma,
A
=
70
Ma,
S
=
22
Ma,
D
=
20
Ma.
In
the
following
i
questions,
give
a
range
of
ages.
a.
When
did
the
folding
occur?
__
‘)\‘\,
b.
When
did
fault
Z
likely
form?
________J
_J
7\‘.“_\
¢.
How
much
missing
time
is
represented
by
X?
kR
k
;
_)
d.
Howoldis
unnF?_“__“W_”\J'i
\x
B
o
e
e.
How
oldis
Faultline
Canyon?
\7‘
SO
Gy
7
\
N
A
e
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