Final answer:
Rock glaciers transfer materials without the lubricating effect of water, moving slowly down mountain valleys as a mass of rock debris frozen in ice.
Step-by-step explanation:
The phenomenon that transfers materials without the lubricating effect of water is known as rock glaciers. Unlike mudflows, landslides, solifluction, and debris flows which may involve water to some extent, rock glaciers move very slowly down mountain valleys, appearing similar to ice glaciers, but they are actually comprised of rock debris frozen in ice. Rock glaciers lack the water content that typically provides lubrication in other mass wasting processes.