What is the in-place granular disintegration product of granite called?

The in-place granular disintegration product of granite is referred to as grus. Grus forms through the weathering of granite, where the granite breaks down into smaller particles, often retaining the composition of the original rock. This process can occur due to both physical weathering, where the rock is physically broken down by processes such as freeze-thaw cycles, and chemical weathering, which alters the minerals within the granite.

Grus is particularly characterized by its gritty texture and the presence of quartz and feldspar fragments, which are the primary components of granite. Its formation contributes to soil development and influences erosion processes in granite-dominated landscapes. Understanding grus is essential for geologists as it helps in interpreting past environmental conditions and assessing the stability and behavior of granitic terrains.