Geology Reference
In-Depth Information
Notebooks (plenty to complete your task and MAKE SURE they have your
name and contact details in case you mislay one), graph paper, stereonet
and tracing paper are useful in case you need to make detailed base maps
and wish to plot structural data, and so on. You may also set up your own
logging templates to record field data (see Section 2.3).
A compass clinometer (check that it is set correctly for your position on
the planet - information about magnetic declination can be found on most
maps), a GPS hand receiver (again this must be checked for the correct
datum and grid referencing system). It is vitally important that you record
the settings of both your compass clino and your GPS into every notebook
so that data can be corrected or converted later if need be.
A hand lens (a magnifying glass can also be useful), pen knife, fine pencils
for initial mapping, fine mapping pens (various colours), coloured pencils,
rulers, calculator, grain size and fieldwork tables chart (a variety of small
cards with basic info on grain size, sorting and other key geological charts
are available - and you can always construct your own).
Hammer, tampered chisels, a trowel (in good working order in uncon-
solidated material, for example, pyroclastics). Variety of measuring tapes,
string and
A hard hat, high visibility jacket/vest, protective glasses, first aid kit.
We have tried to make this list as detailed as possible to cover most even-
tualities. In many cases you would not have all of this on your person in one
go, but to have the above available at short notice, for example a base camp
or field centre accommodation, then you will be able to fully adapt to what is
required for your fieldwork.
2.2 Preparing Maps and Basic Mapping
A detailed description of geological mapping is beyond the scope of this field
guide and one should refer to the specific mapping guide in this topic series.
However, it is vitally important that the locality and general relationships of
the igneous rocks you are studying is recorded on the appropriate maps. This
would also include mapping out the distribution of the rock units at a variety
of scales, and understanding how to refer key units between maps, logs and
notebooks. When mapping out igneous terrains a standard scale would be to use
1 : 10 000 (metric) scale GREEN base maps (having contours, roads and other
basic map ornaments in green help emphasise the geology you map onto them),
but you may also be required to map and record information at different scales
to capture the variations that are present in outcrop. It is also important to be
aware of some of the key symbols that you may require when recording struc-
tures of igneous rocks in the field such as bedding, contacts, joints, and so on
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