IS 7422 : Part 4 : 2024 Symbols and Abbreviations for Use in Geological Maps, Sections and Subsurface Exploratory Logs - Part 4 Metamorphic Rocks

1 SCOPE

This standard (Part 4) covers symbols for metamorphic rocks for use in geological maps, sections and logs of bore holes, test pits, exploratory drifts and shafts for river valley projects. Rock types covered in the standard are restricted to those commonly met with in engineering practice.