Question
1
(5
points)
.~
Saved
Read
the
descriptions
of
the
features
labeled
on
this
figure
in
the
Chapter
9
Investigation
in
your
textbook
and
determine
the
order
in
which
the
rocks
and
geologic
features
formed
(e.g.,
make
a
list
of
the letters
from
oldest
to
youngest).
What
is
the
oldest
rock
unit
in
the
area?
@
Greenish
Shale
(B)
()
Granite
(G)
()
Dike
(D)
O
Gray
Limestone
(K)
O
Tan
Sandstone
(A)
Question
2
(4
points)
.
Saved
How
did
the
uncomformity
between
the
granite
(G)
and
overlying
coarse
sandstone
(C)
form?
the
sandstone
was
eroded
into
a
gentle
landscape,
and
then
the
granite
came
in
later.
O
faulting
or
folding
placed
the
sandstone
over
the
top
of
the
granite.
magma
rose
into
the
crust,
stopping
at
the
base
of
the
sandstone
and
baking
the
sandstone.
the
granite
formed
at
depth
and
was
uplifted
and
eroded,
and
the
sandstone
was
deposited
on
top.
Question
3
(4
points)
The
Chapter
9
Investigation
in
the
textbook
has
a
table
of
fossils
and
their
geologic
period.
Based
on
this
table,
which
rock
unit
contains
the
oldest
fossils?
O
Gray
Limestone
(K)
(7)
Tan
Sandstone
(A)
(O)
Reddish
Sandstone
(S)
O
Greenish
Shale
(B)
()
Older
River
Gravels
(R)
(©)
Coarse
Sandstone
(C)
Question
4
(4
points)
-
Saved
Use
the
data
in
the
following
table
to
calculate
the
number
of
half
lives
that
have
passed
since
the
granite
(G)
formed.
How
many
half
lives
have
passed?
(Be
careful
the
table
in
this
question
is
different
from
the
worksheet
and
textbook)
-
#
of
Half
-
Half-Life
of
#
Parent
#
Daughter
B
Rock
Unit
Lives
that
Age
Isotope
Atoms
Atoms
Have
Passed
Granite
(G)
|
02
billion
250
7750
Dike@)
|
30
milion
125
875
(®)
500
()
250
o7
O3
02
~
a
