There is no standard lot size. However, some cities have similar lot sizes for houses. In Southern California, it's not uncommon for lots to be about 50' X 100', or about 5,000 square feet, in size. That's less than 1/8 acre, since an acre is something over 42,000 square feet. Some cities require that lots be of a certain size or higher before a second dwelling can be erected there, or restrict the square footage of the house on the lot to some proportion of the lot area.
General Types of Gold Ores: Gold deposits are often classified according to their association. The first of these may be catalogued as quartzose. This implies that the gangue mineral is acid, that is, quartz, and that fluorite may abound, or even the other gangue minerals of the alkaline earth group.
Gold ore (size: 7.5 Ã 6.1 Ã 4.1 cm). Cart for carrying ore from a mine on display at the Historic Archive and Museum of Mining in Pachuca, Mexico. An ore is a type of rock that contains sufficient minerals with important elements including metals that can be economically extracted from the rock.The ores are extracted from the earth through mining; they are then refined (often via smelting) to extract the valuable element, or elements.he ores must be processed to extract the metals of interest from the waste rock and from the ore minerals. Ore bodies are formed by a variety of geological processes. The process of ore formation is called ore genesis.