wall rock

1. 1.

   a rock immediately adjacent to a vein or fault

   Broaderrock

Questions about wall rock

What does wall rock mean?

wall rock means "a rock immediately adjacent to a vein or fault".

Is wall rock a common word?

wall rock is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.