0:22 Download Introduction to Environmental Geology, Books a la Carte Edition 4th Edition Book - Duration. The below book, which is on reserve at the library. A handout will be given for each lecture, containing an outline of topics discussed as well as the most relevant figures. It is your responsibility to follow the lectures and fill in relevant information on the handouts provided. Introduction to Environmental Geology, 4th edition. Introduction to Environmental Geology (5th Edition) (510) Edward A. Keller, ISBN-10:, ISBN-13: 9510,, tutorials, pdf, ebook, torrent, downloads, rapidshare, filesonic, hotfile, megaupload, fileserve.

• Intrusive igneous rocks, especially granite, are generally strong rocks that make a good foundation for many structures such as dams and large build- ings. Free Download Font Thai Psp Update on this page. Blocks of these rocks are often resistant to weathering and are used for a variety of construction purposes. 6, 7 • Lava flows that have cooled and solidified often exhibit extensive columnar jointing (Figure 3.20). Columnar jointing is a type of fracturing that occurs during cooling that may lower the strength of the rock. Solidified lava flows may also have subterranean voids known as lava tubes.

Lava tubes can col- lapse from the weight of the overlying material or can carry large amounts of groundwater. Serverliste Fur Emule Laden more. Both features can cause problems during the planning, design, or construction phases of a project. • Tuff is generally a soft, weak rock that may have very low strength.6 The strength of a tuff rock depends upon the degree to which it has become ce- mented or welded. Some tuff may be altered through weathering into a type of clay known as bentonite, an extremely unstable material.

When bentonite is wet, it expands to many times its original volume and is unstable. It is difficult to make generalizations about the suitability of extrusive igneous rocks for specific uses. Careful field examination is always necessary before large structures are built on such rocks. 6 Planning, designing, and constructing engineering projects on extrusive rocks, especially pyroclastic debris, can be complicated and risky.7 This fact was tragically emphasized on June 5,1976, when the Teton Dam in Idaho failed, killing 14 people and inflicting approximately $1 billion in property damage. Just before the failure, a whirlpool several meters across was seen in the reservoir, strongly suggesting that a tunnel of free-flowing water had developed beneath the dam. In fact, the dam was built upon highly fractured volcanic rocks. Water began moving under the foundation as the reser- voir filled.

When the subsurface moving water came into contact with the dam, it quickly eroded a tunnel through the base of the dam, causing the whirlpool. The dam collapsed just minutes later, and a wall of water up to 20 m (66 ft) high rushed downstream, destroying homes, farms, equipment, animals, and crops for 160 km (100 mi) downstream from the dam failure. F i g u r e 3.20 Columnar jointing or fracturing These joints or fractures in basalt form because of contraction during cooling. This photo was taken at Devil's Postpile National Monument, Sierra Nevada, California. Sylvester) 88 Chapter 3 Minerals and Rocks 3. 6 Sedimentary Rocks Sedimentary rocks constitute about 75 percent of all rocks exposed at the surface of Earth (Figure 3.21).