Oxford Cambridge and RSA
*1842734026*
Monday 9 June 2026 – Afternoon
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra
space use the lined pages at the end of this booklet. The question numbers
must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks
might be given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
, 2
OCR is an exempt Charity
Turn over
1
(a) The diagram shows some folded sedimentary rocks in a cliff face.
South North
(i) Label the diagram to show:
• hinge line
• joints
• limb [3]
(ii) Name the type of force that formed this fold.
.....................................................................................................................
................................ [1]
(iii) Draw arrows on the diagram of the cliff face to indicate the maximum
stress directions. [1]
(iv) Describe the distribution of the slaty cleavage shown in the diagram and
explain how this structure formed.
.....................................................................................................................
.....................................
.....................................................................................................................
.....................................
.....................................................................................................................
.....................................
© OCR 2026
, 3
.....................................................................................................................
................................ [2]
(v) Explain why the minor folds are only found in the shale.
.............................................................................................................................
.............................
.............................................................................................................................
.............................
.............................................................................................................................
.............................
.............................................................................................................................
........................ [2]
(b) Draw lines to connect each term to the correct description of structures
that are found in deformed rocks.
Term Description
Ductile flow when subjected to stress and
Boudinage
strain
Buckling Striations resulting from friction
Cylinder or lens-like structures forming
Plunge
layers
A fold that has an axis tilted from the
Slickensides
horizontal
[4] (c) Stress and strain result in folding and faulting of rocks.
(i) Define the term strain.
.....................................................................................................................
.....................................
.....................................................................................................................
................................ [1]
(ii) The graph shows the behaviour of a metamorphic rock that has been
subjected to stress and strain.
© OCR 2026 Turn over
, 4
stress
strain
Label the graph to show:
• elastic deformation
• elastic limit
• rupture or faulting [3]
(iii) This metamorphic rock was deformed at 350 °C.
Sketch a line on the graph to indicate the behaviour of the rock if it had
been deformed at 600 °C.
[1]
(iv) Describe how confining pressure can affect the deformation of rocks.
.............................................................................................................................
............................. ...............................................................................................
...........................................................
.....................................................................................................................
.....................................
.....................................................................................................................
................................ [2]
2
(a) Scientists have used microfossils to reconstruct the atmospheric
composition of the last
60 million years. Deep sea sediment cores were taken from different parts
of the ocean floor. The microfossils were extracted and chemically
analysed using several methods, including isotope analysis.
The results are shown in the graph.
© OCR 2026
*1842734026*
Monday 9 June 2026 – Afternoon
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra
space use the lined pages at the end of this booklet. The question numbers
must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks
might be given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an
asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
, 2
OCR is an exempt Charity
Turn over
1
(a) The diagram shows some folded sedimentary rocks in a cliff face.
South North
(i) Label the diagram to show:
• hinge line
• joints
• limb [3]
(ii) Name the type of force that formed this fold.
.....................................................................................................................
................................ [1]
(iii) Draw arrows on the diagram of the cliff face to indicate the maximum
stress directions. [1]
(iv) Describe the distribution of the slaty cleavage shown in the diagram and
explain how this structure formed.
.....................................................................................................................
.....................................
.....................................................................................................................
.....................................
.....................................................................................................................
.....................................
© OCR 2026
, 3
.....................................................................................................................
................................ [2]
(v) Explain why the minor folds are only found in the shale.
.............................................................................................................................
.............................
.............................................................................................................................
.............................
.............................................................................................................................
.............................
.............................................................................................................................
........................ [2]
(b) Draw lines to connect each term to the correct description of structures
that are found in deformed rocks.
Term Description
Ductile flow when subjected to stress and
Boudinage
strain
Buckling Striations resulting from friction
Cylinder or lens-like structures forming
Plunge
layers
A fold that has an axis tilted from the
Slickensides
horizontal
[4] (c) Stress and strain result in folding and faulting of rocks.
(i) Define the term strain.
.....................................................................................................................
.....................................
.....................................................................................................................
................................ [1]
(ii) The graph shows the behaviour of a metamorphic rock that has been
subjected to stress and strain.
© OCR 2026 Turn over
, 4
stress
strain
Label the graph to show:
• elastic deformation
• elastic limit
• rupture or faulting [3]
(iii) This metamorphic rock was deformed at 350 °C.
Sketch a line on the graph to indicate the behaviour of the rock if it had
been deformed at 600 °C.
[1]
(iv) Describe how confining pressure can affect the deformation of rocks.
.............................................................................................................................
............................. ...............................................................................................
...........................................................
.....................................................................................................................
.....................................
.....................................................................................................................
................................ [2]
2
(a) Scientists have used microfossils to reconstruct the atmospheric
composition of the last
60 million years. Deep sea sediment cores were taken from different parts
of the ocean floor. The microfossils were extracted and chemically
analysed using several methods, including isotope analysis.
The results are shown in the graph.
© OCR 2026
