Weathering

Key concepts

How Weathering connects to the ideas, people and events around it.

1. Soil formation

   contributes to

   Soil formation is the process by which weathered rock material combines with organic matter to create soil horizons. In the United States, the USDA classifies soils into 12 major orders based on these processes.

2. James Hutton

   studied by

   James Hutton was an 18th‑century Scottish geologist who introduced the concept of deep time and uniformitarianism. He argued that present‑day weathering and erosion shape the Earth gradually over immense periods.

3. Grand Canyon

   exemplified at

   The Grand Canyon in Arizona showcases extensive weathering and erosion of layered sedimentary rocks. Its visible strata record millions of years of geological processes.

4. Climate

   affected by

   Climate determines the rate and dominant type of weathering in a region. Tropical climates accelerate chemical weathering, while arid climates favor physical weathering.

5. Lithology

   depends on

   Lithology refers to the physical characteristics of rock types, influencing how they weather. Granite, for instance, is more resistant to chemical weathering than limestone.

6. Erosion

   paired with

   Erosion is the transport of weathered material by agents such as water, wind, or ice. It works in tandem with weathering to sculpt landscapes like river valleys.

Questions about Weathering