Types of Weathering © Copyright 2004 - 2005. M. J. Krech. All rights reserved.

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Types of Weathering © Copyright M. J. Krech. All rights reserved.

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Types of Weathering © Copyright M. J. Krech. All rights reserved.

Presentation transcript:

Types of Weathering © Copyright 2004 - 2005. M. J. Krech. All rights reserved.

Mechanical Weathering

Water Action: Drying, Freezing & Thawing

Abrasion

Wind Abrasion

Water Abrasion

Organic Activity: Root Pry/Growth of Plants

Animal Actions:

Release of Pressure

Chemical Weathering: rocks breaks down as a result of chemical reactions, the rock chemically becomes something different

Water - hydrogen & oxygen combine with rock and turns it into a new substance

Feldspar +Water = Clay Feldspar A Clay Cliff

Plant Acids: dissolves rocks

Acid Precipitation

Photo taken 100 years ago Photo taken recently

Both of these are Civil War headstones. Why has one weathered more? 1865 1862

Oxidation; a chemical reaction in which a substance combines with oxygen to form a different substance

Carbonation – when carbon dioxide reacts with rocks forming a substance easily carried away by water

Example: carbonization of limestone results in karst.

Karst Topography

The End © Copyright 2004 - 2005. M. J. Krech. All rights reserved.