Recording features of sedimentary rocks and constructing graphic logs - Geological Field Techniques - page 118

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Figure 6.4 A neat version of a typical graphic log with some of the key features labelled. The fi eld version
should look very similar except it might not be drawn to scale vertically and there might be other columns with
samples, photographs and links to more detailed notes on particular contacts and/or units. For examples of fi eld
graphic logs see Figures 4.2b, 5.10, 6.9b, 6.11 and the topic cover.
Graphic logs have many advantages because they:
• are a succinct method of summarizing a lot of data;
• immediately give an impression of the vertical succession
and can therefore aid in the identifi cation of repetitions and
major changes in the sedimentary facies;