To confirm the observations that we have made in a long distance and to study materials as samples we go close to the outcrop. For each of the considered units it will be necessary:
- To study its structure: you can make incline measurements of layers, cracks, faults, etc. To make a hypothesis would be convenient in order to classify the rock in one of the main groups.
- Look for the most suitable place to take a sample.
- For its entirety, we will have to:
- Analyse it closely so as to examine great interest areas, e.g. jointed and fracture areas, internal structure of layers…
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