TS ISO 710-3/D1

TS ISO 710-3/D1 is the third part of the graphical-symbols series for showing magmatic rocks on detailed geological maps, plans and geological cross-sections. In practical cartography, this kind of symbol system helps readers identify rock units, trace their extent and understand structural relationships at a glance; this document focuses on the magmatic-rock portion of that visual language.

Where magmatic-rock symbols fit in geological drafting

Magmatic rocks form when molten material cools and solidifies, and in geological interpretation they are commonly distinguished by intrusive or volcanic origin. On maps and sections, consistent symbolization makes it easier to read unit boundaries, rock types and field relationships. This standard addresses the graphical representation used for magmatic rocks within the broader practice of geological drawing, supporting consistency in how such features are presented across documents and organisations.

Technical value of this part

• Applies to detailed geological maps, plans and geological cross-sections.
• Covers graphical representation of magmatic rocks.
• Supports consistency between geological information and visual notation.
• Helps standardise map reading, comparison and interpretation.
• Relates directly to geological cartography and technical drafting practice.

This document defines the magmatic-rock part of the symbol system rather than the whole series on its own. In geological mapping practice, standards of this type help keep field observations and drawn outputs aligned, so the same rock group can be presented with comparable visual rules across reports and maps.