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P285.00
Graphical symbols for use on detailed maps, plans and geological cross-sections Part 4: Representation of metamorphic rocks
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This is an international standard gives generalrules for the representaion of rocks and minerals on a detailed maps, plans and cross sectionals.
The symblos maybe divided into two:
1. Main types
2 Varia
They are reproduced in two tables which been derived from a logical system may be completed easily in case of need.