How do geologist use vinegar to identify rock samples?

Geologists use vinegar, which contains acetic acid, to identify rock samples by observing the reaction it has with carbonate minerals, such as calcite. When vinegar is applied to these rocks, it reacts with the calcium carbonate, producing carbon dioxide gas, which results in fizzing or bubbling. This reaction helps geologists determine the presence of carbonates in the rock, aiding in its classification and understanding of its geological history.