710/4 International Standard (ISo Graphical symbols for use on detailed maps, plans and geological cross-sections - Part 4 : Representation of metamorphic rocks Symboles graphiques a utiliser sur les cartes, les plans et les coupes geologiques detaillés - Partie 4 : Représentation des roches metamorphiques First edition 1982-04-15 SO 710/4-1982 (E) UDC 528.94 : 552.4 : 003.62 Ref. No. ISO 710/4-1982(E) Descriptors : geology, maps, drawings, schematic presentation, transverse sections, symbols, graphic symbols, metamorphic rocks. Price based on 4 pages Copyright International Organization for Standardization Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing Inter- national Standards is carried out through Iso technical committees. Every member body interested in a subject for which a technical committee has been set up has the and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IsO Council. international Standard ISO 710/4 was developed by Technical Committee ISO/TC 82, Mining, and was circulated to the member bodies in June 1981. It has been approved by the member bodies of the following countries : Germany, F.R. Brazil Romania Czechoslovakia India Sweden Egypt, Arab Rep. of Netherlands United Kingdom France Poland USSR No member body expressed disapproval of the document. International Organization for Standardization, 1982 Printed in Switzerland without license from IHS Not for Resale ISO 710/4-1982 (E) INTERNATIONAL STANDARD Graphical symbols for use on detailed maps, plans and geological cross-sections Part 4 : Representation of metamorphic rocks 2 Main types O Introduction Other documents in this series on graphical symbols for use on 2.1 Principles of representation (see table 1) detailed maps, plans, and geological cross-sections include : Part 1 : General rules of representation. 2.1.1 Table 1 comprises the most important rocks of the three facies or zones of metamorphism. It is divided into three coi- Part 2 : Representation of sedimentary rocks. umns containing the symbois for the rocks of the facies of green schists, of amphibolites, and of granulites. Part 3 : Representation of magmatic rocks. These three facies are roughly equivalent to the older groups of Part 5 : Representation of minerals. epizone, mesozone, and catazone rocks. Part 6 : Representation of. contact rocks and rocks which As the limits between the two groups characterized by a higher have undergone metasomatic, pneumatolytic or hydrother- degree of metamorphism do not coincide, the subdivision be- mal transformation or transformation by weathering.1) ing based on facies or zones, a dotted line is used to divide them. Part 7 : Tectonic symbols.1) 2.1.2 The basic symbol for metamorphic rocks is a short wavy line. This basic symbol may be used to indicate metamorphic rocks in general, i.e. when no further information is needed or 1 Scope and field of application when the scale of the map makes a fine distinction impossible. This part of Iso 710 provides a series of symbols and orna- In conjunction with additional symbols, the wavy line is used to ments for the representation of metamorphic rocks on detailed represent metamorphic rocks of the main types. Hence, it is maps, especially large-scale maps, plans, and geological cross- crossed by one or two strokes to indicate the groups which sections. have been subjected to higher grade metamorphism. The symbois are divided into two groups : The basic symbol is to be found at the top of the table. Then, at the top of each column, symbols are indicated with a view to a 1) main types; more detailed representation. These symbols are the basic sym- bols for the three facies or zones of me