1. Interpreting the past delivery guide Learner resource 3
Using graphic logs

2. Graphic Logs Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

3. Graphic Logs Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

4. Graphic Logs X-axis modal grain size
Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

5. Graphic Logs X-axis modal grain size
Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

6. Graphic Logs Lithology shown by stipple
Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

7. Graphic Logs Sedimentary features and fossils by symbols
Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

8. Graphic Logs Y-axis cumulative thickness of the beds
X-axis modal grain size
Lithology shown by stipple
Sedimentary features and fossils by symbols

9. Saffron Walden, Essex
Serpentinite band, oolitic limestone, marble columns
24 cm fine sandstone with calcite cement
35 cm grainstone, ooliths, sand and broken shell, ripples
18 cm Purbeck Marble packestone with snail fossils
43 cm fine sandstone with calcite cement
47 cm well sorted medium sandstone with crossbedding
33 cm light grey marble with ghost crossbeds
32 cm fine micaceous sandstone with low angle crossbedding

10. Saffron Walden, Essex

11. Burghead, Morayshire Channel 2m rule Triassic Sandstone
A North Sea reservoir rock
Channel

12. Burghead, Morayshire The ruler is 2m long
Identify part of a channel in the cliff
How many types of sedimentary structures can you identify?
Sketch a summary log of the sequence you should be able to identify around 15 beds
What evidence is there that this is an arkose?

14. OCR Resources: the small print OCR’s resources are provided to support the teaching of OCR qualifications, but in no way constitute an endorsed teaching method that is required by the Board, and the decision to use them lies with the individual teacher. Whilst every effort is made to ensure the accuracy of the content, OCR cannot be held responsible for any errors or omissions within these resources. © OCR This resource may be freely copied and distributed, as long as the OCR logo and this message remain intact and OCR is acknowledged as the originator of this work.
OCR acknowledges the use of the following content: SedLog software, a shareware program for drawing graphic logs and log data manipulation", D. Zervas, G.J. Nichols, R. Hall, H.R. Smyth, C. Lüthje and F. Murtagh, Computers & Geosciences, 35, , 2009.
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