How soils form
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How Soils Form. Image: T. Loynachan. Soils-2-1. Physical weathering breaks rocks into small mineral particles that accumulate on the Earth’s surface. Images: Martin Miller, NRCS. Soils-2-2. Chemical weathering dissolves and changes minerals that have accumulated on the Earth’s surface.

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How soils form

How Soils Form

Image: T. Loynachan

Soils-2-1


How soils form 1329095

Physical weathering breaks rocks into small mineral particles that accumulate on the Earth’s surface.

Images: Martin Miller, NRCS

Soils-2-2


Chemical weathering dissolves and changes minerals that have accumulated on the earth s surface

Chemical weathering dissolves and changes minerals that have accumulated on the Earth’s surface.

Images: National Cooperative Soil Survey, University of Nebraska

Soils-2-3


Decomposing organic material from plants and animals mixes with accumulated soil minerals
Decomposing organic material from plants and animals mixes with accumulated soil minerals.

Images: NRCS, Soil Classifiers of Michigan

Soils-2-4



How soils form 1329095

Continued physical and chemical changes over hundreds to thousands of years produce layers called soil horizons.

Image: National Cooperative Soil Survey

Soils-2-6


The formation of soils
The Formation of Soils thousands of years produce layers called soil horizons.

Image: T. Loynachan