What symbol denotes a U.S. location or mineral monument?

• A. A solid black triangle, sometimes with USMM and a number next to it.
• B. A hollow circle with a dot.
• C. A square with a cross.
• D. A star.

Answer: (A)

Maps use specific symbols to represent fixed survey points. A solid black triangle is the symbol you’ll see for a triangulation station or official survey monument, often shown with an identifying label like USMM and a number. This makes sense for a U.S. location or mineral monument because it points to a precise, recorded point used in surveying and mapping.

The other symbols represent different features on maps, so they don’t indicate a survey monument: a hollow circle with a dot, a square with a cross, or a star are used for other types of places or landmarks, not the fixed surveying point described here.