2. You will be given a
map which shows
some simple
geological
structures and
features to interpret.
There will also be
some questions
which relate to the
map and to the
rock, mineral and
fossil specimens.
4. The key will include the
Rock Units shown on the
map. Sometimes you are
told what type of rocks each
rock unit represents but not
always. It is a good idea to
write the letters of each rock
unit on the map before you
start using it.
The key also tells you which
rock units have a specimen
available to study.
5. Folds
What type of folds are
these? What is the trend
and the symmetry of
these folds?
A
B
6. Folds
There are two folds on this map. What type
of folds are they? What is the trend and
the symmetry of these folds?
A B
7. Unconformities mark
times when erosion is
dominant and no
sediments are deposited.
They mark a break in
deposition because of
uplift and mountain
building. The rocks above
overlay the rocks below
UNCONFORMABLY and
are often very different in
dip and strike.
Unconformities cut across other beds.
8. Folds
What type of fold
is this? What is
the trend and the
symmetry of this
fold?
Give the
geological history
of this map.
A B C
D
9. Unconformi
ties
Locate a fold
and an
unconformity on
this map.
Describe them
both fully.
Give the
geological
history of this
area.
A
B
C
D
10. Unconformities
Where are the unconformities on these
maps?
How can you be sure that they are
unconformities?
A
B
11. Unconformities
Locate two
folds and an
unconformity
on this map.
Describe them
both fully. Give
the geological
history of this
area.
A
B C
D
12. Locate a fold and an unconformity on this
map. Describe them both fully.
14. Faults
If faults are shown by straight lines then they
are vertical. If faults have a sinuous outcrop
then they are at an angle to the horizontal and
are probably reverse or thrust faults.
What type
of faults are
these?
What is the
geological
history of
this area?
F2
A
B
C
D E
15. Faults
What type of fault
is F2?
How do you
know?
Why does it
appear to be in
two sections?
granite
16. Faults
The youngest rocks are always on the
downthrow side of a fault. You need to know
how old each rock is to find out the downthrow.
17. Faults
Strike-slip faults are vertical but the
movement on them is lateral (sideways). If
the far side moves to the right the sense of
movement is dextral, if it moves to the left the
movement is called sinistral. Which way has
this strike-slip fault moved?
18. Faults
What types of faults are
F1 and F2? How can
you tell?
Which one occurred
first? How do you
know?
What is the geological
history of this area?
A
B
C
D
E
20. Which fault F1 or
F2 is not vertical?
How do you know?
Which fault F1 or
F2 came first?
How do you know?
What is the
geological history of
this area?
A B
C
D
E
24. Graphic logs
Give the evidence
from the graphic log
that shows that these
rocks were laid down
in a fluvial
environment.
Asymmetrical
ripples
Cross bedding
Erosional base
32. Questions
State three pieces
of evidence, either
from Map 3 or your
fieldwork or
knowledge, which
confirm the
presence of an
unconformity.
Draw and label on
Map 3 the axial
planes of two folds
to the east of Fault
F2.
33. Rock unit B was deposited in tropical, shallow
seas. What evidence from the photo and the
graphic log would confirm this statement?
