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.
Types of Mass Wasting. A rock fall are the fastest of all landslide types and occurs when a rock falls through the air until it comes to rest on the groundânot too complicated. In Utah, they are common in the spring and fall because of freeze-thaw weathering.