gold
The lake is Lake Maracaibo, actually a brackish bay off the Gulf of Venezuela.
Venezuela is not known for its raw diamond deposits. You can purchase a gem-quality diamond in any jewelery store that sells diamonds in Venezuela.
Venezuela currently has the largest oil reserve. Saudi Arabia used to have the largest, but was recently surpassed, as Venezuela's deposits were at 296.5 billion barrels at the end of 2013.
These are called veins
Alaska, Texas, Venezuela, Saudi Arabia and any of the oil producing nations.
Mineral deposits are formed when ground water that contains dissolved minerals are cooled or has evaporated. Some of these mineral deposits are iron ions, magnesium, and calcium.
The Appalachian Plateau region in Georgia contains the state's only coal deposits. This region is located in the northeastern part of the state near the borders with Tennessee and North Carolina.
Venezuela has the largest oil reserves in the world, with significant deposits located in the Orinoco Belt.
Gary B. Sidder has written: 'A bibliography of the geology and mineral deposits for the Guayana Shield, Venezuela' -- subject(s): Bibliography, Mines and mineral resources, Geology, Venezuela 'A report on work in progress for the Reno 1' -- subject(s): Prospecting, Geology 'Mineral deposits of the Reno 1' -- subject(s): Mines and mineral resources, Bibliography
ruhr valley
Oil sands are predominantly found in Alberta, Canada, with the largest deposits located in the Athabasca region. Other smaller oil sands deposits can also be found in various regions around the world, including Venezuela and Utah in the United States.
Superheated water forces its way into rock faults. It contains many dissolved minerals which crystallise out when the water cools.