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This Topic in Depth explorers the Web's offering on quarries. The first site is maintained by RJMaxwell.com entitled Education: Quarrying Process and Quarry Products (1). Through descriptions, photographs, and interesting animations, the site does a good job of explaining how quarries are operated and what types of stone commonly come out of them. The second site, Hardrock Mining Overview (2), is from the Environmental Protection Agency. Visitors can read about the industry of hardrock mining, its economic value, types of mining activities, and more, on this one-page site. Next, from Pit and Quarry, comes the Quarryology 101 (3 ) educational Web site. The site takes users through twenty lessons on everything from site selection and preparation to drilling and blasting. Each interesting lesson contains two parts as well as an online quiz. The fourth site on quarries is provided by the online magazine Rock Products. The Quarry Tour (4 ) page contains descriptions on the various steps in quarrying including loadout, drilling/blasting, sand, crushing, hauling, and conveying. The United Kingdom's Quarry Products Association (5) maintains the next Web site of the same name. Visitors of the site can read a profile of the industry, news, how quarries affect the environment, learn about quarry products, view a quarrying map of the United Kingdom, and much more. Those interested in quarries of the United States will appreciate the next site by the US Geological Survey called, List of Mines, Mills, and Quarries (6). The site is actually a collection of photographs from dozens of sites from around the country along with brief location descriptions. The seventh site is maintained by the D'Amico Quarry Company called Products and Services (7). As the title suggests, visitors will find a list of available building, patio, and landscaping products that are produced from the quarry. Clicking on the individual product name brings up several pictures giving visitors a "concrete" idea of how extensively these products are used. The last site is an International Comparison of Quarrying Methods (8) provided by Stoneworld.com. This interesting site is described as a review of quarry sites around the world that offer a broad cross section of the techniques and equipment used for extracting a variety of materials. Although it doesn't go into great detail, the site does provide some interesting facts and descriptions worth exploring. [JAB]

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