The thin layer of bedrock below the Earth's surface is the foundation for all life on land. Cracks and fractures within bedrock provide pathways for air and water, which chemically react to break down rock, forming soil -- an essential ingredient for all terrestrial organisms. Scientists have dubbed this layer Earth's 'critical zone.' Now scientists have found a way to predict the spatial extent of bedrock weathering.
from Geochemistry News -- ScienceDaily http://ift.tt/1PX52c4