Geoscience Reference
In-Depth Information
colour for vegetation
or to distinguish features
orientation
clear
title
minimal
labels
positioned
so they
are not
obscuring
the sketch
4
simple
ornament
to help
define the
unit
shading to
show darker
coloured
layers
small
amount of
interpretation
scale
use of
different
line weights
edge of sketch
clearly defined
inset box to show position
of higher resolution
sketches or position
of photographs
Figure 4.4
An annotated example of a fi eld sketch showing some of the key features that can usefully be
included in a sketch. This sketch is of Kimmeridgian rocks exposed in northeast Scotland. (Notebook of Angela L.
Coe, The Open University, UK.)
•
Angles and geometry:
Boundaries between units and
features within units (e.g. cross-stratifi cation or folding) are
best shown at approximately the correct angle of dip. This
will not only make the sketch look more realistic, it will be
more accurate and make the features easier to identify. In
general people tend to exaggerate angles (i.e. make them
steeper). A simple technique for obtaining a good estimate
of the angle is to put your compass-clinometer into the
clinometer mode (Figures 2.6 (step 2) and 2.7 (step 3)) and
then holding the compass-clinometer at arm's length with
