rock-quality designation

Related Overviews


More Like This

Show all results sharing this subject:

  • Earth Sciences and Geography


Quick Reference


Rough measure of the degree of jointing or fracture in a rock mass, measured as a percentage of the drill core in lengths of 10 cm or more. High-quality rock has an RQD of more than 75%, low quality of less than 50%.

Subjects: Earth Sciences and Geography.

Reference entries