A surgical mask is used inside the operating room or during other sterile procedure areas to protect the patient environment from contamination. Surgical masks have ties so that they can be adjusted for fit, and are tied over the top of a surgical or bouffant cap.
rockfall. 1  an act or instance of the falling of rock, as in a cave-in or an avalanche. 2  a mass of rocks that have fallen: to be trapped under a rockfall.
A quarry rock splitter is someone who splits or separates blocks of rough stone from a quarry mass, using a jackhammer and wedges. It is a highly specialized job that is only done in stone quarries, which are a type of open-pit mine from which rock and minerals are extracted for use as building materials.