What does 'Gravel, sand, clay or borrow pit' indicate within the Mines and Caves symbols?

• A. A type of sedimentary rock formation.
• B. A deposit symbol indicating gravel, sand, clay, or borrow pit relevant to mining.
• C. A storage site for processed minerals.
• D. A surface water feature.

Answer: (B)

The symbol means a deposit of loose materials that can be mined or used as a source, not a bedrock feature. Gravel, sand, and clay describe unconsolidated sediments, and a borrow pit is a place where such material has been dug up for use elsewhere. On Mines and Caves maps, this is shown as a deposit symbol to indicate where these materials occur and may influence mining methods, accessibility, and planning. It’s not indicating a sedimentary rock formation, a storage site for processed minerals, or a surface water feature.