from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. erosion caused by freezing / thawing due to snow
from The Century Dictionary and Cyclopedia
- n. In geology, the condition of being snow-covered; also the erosive and transporting action of a cover of snow.
Sorry, no etymologies found.
As the snow begins the nivation process from snowflakes to ice a stage named granular snow, pore space increases, air movement and subilimation loss increase significantly directly from the granules but also from the soil surface.
Curry, writing from the Department of Geography of the University of North Carolina, reported that, in 1963 and 1964, during studies of Little Ice Age glaciation and nivation in the mountains of southwestern U.S., a number of stands of bristlecone pine were encountered, including a previously unstudied stand at Wheeler Peak in east Nevada gazetteeer location: 38.9861N; Longitude: -114.312.
I can see how individual layers of ice are identified in the plastic layer where the process of transformation of snow to firn to ice nivation is occurring, but in the Plastic Layer individual layers are quickly blurred and melded together.