Geoscience Reference
In-Depth Information
10
Figure 10.3
Detailed geological map of area shown in Figure 10.2b, drawn after 'ground-truthing' of
ASTER images confi rmed which rock type(s) gave which spectral response. 'AEG' and 'DPP' are two types
of granite distinguished by fi eld relations. (Modifi ed from King 2007.)
Table 10.2
Summary of the
equipment required for mapping
(see also Tables 2.1-2.3).
10.2.2 Equipment for mapping
The use of tools for geological fi eldwork has been covered in
Chapter 2 (Tables 2.1-2.3, pp. 4 and 6), and only a few further
remarks with regard to equipment needed for geological
mapping are made here (Table 10.2). A long surveyor's type of
tape measure (
c.
30 m) is useful for some surveying (e.g. Figure
2.13, item 1, p. 26), though you should also practice pacing out
distances accurately (Section 3.1.3). A map case (Figure 10.4) is
essential to protect fi eld maps from the elements (rain, sun,
dust). A good map case has a see-through cover so you can
check your position and your data quickly. The case should also
allow easy addition of data to the map, with a rigid base on
which to write and plot. A supply of strong rubber bands or
clips is invaluable for holding fi eld maps and other sheets in
place. Some geologists favour the discipline of mapping directly
onto a base map; others prefer using a rainproof, plastic overlay
Mapping equipment
Ruler
Protractor
Map case
Base maps
Clips/rubber bands
Mapping pens
Full selection of coloured pencils
