Placer mining is the extraction of minerals from alluvial deposits, often at the site of flowing water. Minerals that have been eroded from an upstream source and carried by a river, called placer, are deposited along th... More » Science Earth Science Geology

Hard rock mining, placer mining, by-product mining and gold ore processing are some methods of gold mining. Each method has its unique process of accessing, extracting and processing gold. More »

MineListings, Gold Rush Expeditions, Prospecting and Mining Journal, and Gold and Silver Mines carry listings of patented mining claims for sale on their websites. A patented mining claim includes the deed to the propert... More » Business & Finance Investing

Breccia is located wherever fragments of broken rocks or minerals accumulate, such as stream deposits and outcrop bases. The fragments are joined together by small rock particles or cement, which creates the breccia rock... More »

Human impact on tundra regions includes melting permafrost caused by climate change and physical damage to ecosystems and habitats resulting from the mining and extraction of oil, natural gas and other minerals. Tundras ... More » Science Environmental Science Human Impact

Soil is composed of minerals, water, air and organic matter. Soil is formed on the surface of the Earth, which can be referred to as the skin of the earth. More »

Clay most commonly forms due to erosion or weathering; both methods involve rocks coming into contact with something, such as air or water, to form the clay from existing minerals on the ground. It is common for clay to ... More »