Over deze norm
Provides a unified series of symbols and ornaments for the representation of magmatic rocks. The symbols and ornaments may be divided in two groups as follows: principal types; varia. They have been reproduced in two tables which, being derived from a logical system, may be completed easily in case of need.
|Engelse titel||Graphical symbols for use on detailed maps, plans and geological cross-sections - Part 3: Representation of magmatic rocks|