OS 710/6 nternational Standard Graphical symbols for use on detailed maps, plans and geological cross-sections - Part 6 : Representation of contact rocks and rocks which have undergone metasomatic, pneumatolytic or hydrothermal transformation or transformation by weathering Symboles graphiques a utiliser sur les cartes, les plans et les coupes geologiques detailles -- Partie 6 : Représentation des roches de contact et des roches ayant subi une transformation metasomatigue, pneumatolytique ou hydrothermale ou une transformation par alteration First edition - 1984-06-01 ISO 710/6-1984 (E) UDC 528.94 : 553.22/.23 : 003.62 Ref.No.ISO710/6-1984 (E) Descriptors : geology, maps, drawings, transverse sections, schematic representation, symbols, graphic symbols, rocks. Price based on 4 pages for Standardizatio Not for Resale Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (iso member bodies). The work of developing International interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental 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 theIso Council. International Standard ISO710/6was developed byTechnical Committee ISO/TC 82, Mining, and was circulated to the member bodies in October 1983. It has been approved by the member bodies of the following countries : Australia Czechoslovakia Romania Austria France United Kingdom Butgaria Germany, F.R. Yugoslavia China Poland No member body expressed disapproval of the document. ? InternationalOrganization for Standardization,1984 Printed in Switzerland CyghmationaganaioStandardizato No reproduction or networking permitted without license from IHS Not for Resale ISO710/6-1984(E) INTERNATIONALSTANDARD Graphical symbols for use on detailed maps, plans and geological cross-sections Part 6 : Representation of contact rocks and rocks which have undergone metasomatic, pneumatolytic or hydrothermal transformation or transformation by weathering 0 Introduction 2 General Iso 710, a series of documents on graphical symbols for use on Therocksdealt with inthispart of ISO710areformed eitherby detailed maps, plans and geological cross-sections, comprises the following parts : rocks)orallochemicalprocesses,i.e.transformationprocesses withallochthone materialwhichgenerallyalsotakeplacewithin Part 1 : General rules of representation. the aureole of a magmatic intrusion. Part 2 : Representation of sedimentary rocks. In general, these rocks owe their existence to pneumatolytic or hydrothermal processes with allochthone material but there are Part 3 : Representation of magmatic rocks. also some rocks formed by molecular diffusion at elevated Part 4 : Representation of metamorphic rocks. result in a greater or lesser degree of transformationwhichis reflected in the rock. Part 5 : Representation of minerals. Occasionally, the transformation processes have produced Part 6 : Representation of contact rocks and rocks which rocks which are identical to those of the metamorphic facies; the hydrothermal sericitisation of a volcanic rock, for example, have undergone metasomatic, pneumatolytic or hydrother- mal transformation or transformation by weathering. may lead to the formation of a sericitic schist. In such a case, it is considered advisable to use the symbol for the metamorphic Part 7 : Tectonic symbols. rock, particularly when no residue of the original volcanic rock remains. 3 Principles of representation (see the table) 1 Scope and field of application This part of ISo 710 provides a series of graphical symbols to 3.1 General represent onamap,planor geological cross-section,rocks which have originated as the result of contact metamorphism, Ba