Geoscience Reference
In-Depth Information
4
(a)
Figure 4.6
(a) Photograph and
(b) sketch of a fold near Berwick-
upon-Tweed, UK illustrating the
technique of tracing several key
beds through the structure in order
to illustrate its overall form.
(Notebook and photograph of
Angela L. Coe, The Open
University, UK.)
(b)
A few other tips:
•
If the exposure is composed of many thin beds with no
really distinct units, concentrate on one or two beds and
use them to depict the overall structure in the cliff (e.g.
Figure 4.6).
•
If the face is structurally complex you may have more than
one possible interpretation. Show this by either completing
more than one sketch, or completing a sketch and adding
several small cartoons to show the different interpretations
or using different colours to depict alternative
interpretations.
