Grus (geology)

GrusSand

Grus is a geological term referring to the accumulation of angular, coarse fragments of rock, typically granitic, that have been weathered in place. This material is often found in arid or semi-arid regions and is a significant component of the regolith in these areas.

Formation

Grus forms through the process of weathering, particularly the physical and chemical breakdown of granite. The primary agents of weathering include temperature fluctuations, frost action, and chemical weathering by water. Over time, these processes cause the granite to disintegrate into smaller, angular fragments.

Characteristics

Grus is characterized by its coarse texture and angular particles. The fragments typically range in size from sand to gravel. The mineral composition of grus is similar to that of the parent granite, often containing quartz, feldspar, and mica.

Distribution

Grus is commonly found in regions with significant granite outcrops. Notable areas include parts of the Southwestern United States, Australia, and other arid to semi-arid regions around the world.

Uses

Grus can be used as a construction material, particularly as a base for roads and as a component in concrete. Its angular nature makes it suitable for use in erosion control and landscaping.

Related Geological Terms

• Regolith
• Weathering
• Granite
• Sediment
• Erosion

See Also

• Granite
• Weathering
• Regolith
• Sediment
• Erosion