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2. Soil Types

Soils can be broadly classified into residual and transported types, each distinguished by their formation processes. Residual soils form at their original location due to chemical weathering, while transported soils are moved and deposited by various agents such as rivers, wind, and glaciers. The examination of soil phases reveals a diverse composition of solids, water, and air, essential for understanding soil behavior in different conditions.

Sections

Soil Types

Soil types can be broadly classified into residual and transported soils, each with distinct formation processes and characteristics.

1 Section Overview

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1.1 Residual Soils

Residual soils are formed in situ and vary in depth, primarily influenced by chemical weathering and vegetation.

1.2 Transported Soils

This section discusses the classification of soils into residual and transported categories, with a focus on how transported soils are formed.

1.2.1 Alluvial Deposits

This section discusses the classification of soils into residual and transported types, with a focus on alluvial deposits formed by rivers.

1.2.2 Lacustrine Deposits

Lacustrine deposits are soil materials deposited in lake environments, influenced by seasonal flow variations of water.

1.2.3 Marine Deposits

This section discusses marine deposits, a type of soil formed from weathered materials transported to sea waters.

1.2.4 Glacial Deposits

This section introduces glacial deposits, a specific type of transported soil formed from weathered materials moved and deposited by glaciers.

1.2.5 Aeolian Deposits

Aeolian deposits are soils formed from particles transported by wind, illustrating a crucial component of transported soils.

Phase Relations of Soils

This section examines the composition of soils as a mixture of solid particles, water, and air, highlighting the significance of these phases.

2 Section Overview

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2.1 Three-phase System

This section discusses residual and transported soils and introduces the concept of the three-phase system in soil, highlighting their components: solid particles, water, and air.

Learning Objectives

  • Soils are classified as residual or transported based on their formation and location.

  • Residual soils are formed from in-situ weathered rock, whereas transported soils are relocated by environmental agents.

  • Soils consist of solid particles, water, and air, and their behavior changes with varying conditions in these phases.

Key Concepts

Residual Soils

Soils that are formed and remain at the same location as their parent rock.

Transported Soils

Soils that have been moved from their original location by various natural forces.

Three-Phase System

A model describing soils as comprised of solid particles, water, and air, where the amount of each can vary under different conditions.

Practice Exercises

Total Questions

2

Estimated Time

4 min

Passing Score

70%

Instructions

  • Read each question carefully
  • You can use hints if you need help
  • Complete all questions before submitting

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