Which tool is commonly used for measuring rock density?

The gamma ray densitometer is specifically designed to measure rock density in a variety of geological contexts. It works by utilizing gamma radiation to assess the density of materials through which it passes. As the radiation interacts with the atoms in the rock, the density can be inferred from the amount of radiation that is either absorbed or scattered. This tool is important in mining and geological exploration as it provides essential data on the composition and characteristics of subsurface materials, which aids in planning extraction and processing strategies.

In contrast, a barometer is used to measure atmospheric pressure, a tape measure is intended for linear measurements, and a laser level is typically employed to establish a level plane or reference for construction and alignment purposes. None of these tools are suitable for evaluating the density of rocks, making the gamma ray densitometer the most appropriate choice for this application.