The Chemistry of Gold Extraction - Essay Example

The transmitted light appears greenish blue. This implies that it reflects red and yellow light. Gold occurs in diverse geologic environments, and its classification into deposit categories is thus intricate. Geologists recognize two kinds of deposits or occurrences of gold, which are primary and secondary. These two kinds depend on the same physical and chemical process to generate economic concentrations of gold ore. The primary type of occurrence often forms in a place where the gold precipitates, which happens during the chemical reaction involving hot fluids, mineralizing solutions, and rocks of the Earth’s crust. Formation of the secondary deposits often occurs later when the mechanical and chemical processes of weathering, as well as erosion,  take place. After the formation of these kinds of deposits, it is then easy to extract them using various techniques. Production of gold in Colorado is something that began a long time ago. Colorado is one of the United States. History provides that Colorado started as a small town because of the gold trade and then later developed into what one can now see presently. Several existing gold mines in Colorado increasingly exploit this natural resource. Some of the districts within Colorado state where goldmines are exploited, include Cripple Creek, as well as Victor Goldmine. The economic contribution of gold to the state of Colorado can never be undermined. Gold has improved the economy of Colorado and has led to the construction of several infrastructural projects. Gold keeps on providing employment opportunities to the youths.

Part 2

Monotremes: They are primitive mammals that lay eggs. Marsupials: Their females have pouches, and their young are born immature and stay in these pouches. Placentals: Their young are born at a stage where they are somehow advanced, and before birth, their young are fed in the womb via the placenta.

The Aepyornithidae and the Double Watted Cassowary are both birds that are light and flightless, hence the similarity. They are both large birds of considerable weight. They both have powerful feet that enable them to run long distances at very high speeds. They both were usually found in dense forest settings and fed on fruits and other vegetation found on the ground.

The double-wanted cassowary has a wattle, which is a fold of skin that hangs from the bird’s neck and the elephant bird does not. It is an excellent swimmer, unlike the elephant bird.

It is covered with coarse black feathers, unlike the elephant bird. It has green light eggs, which and the elephant bird has large white eggs similar to that of the ostrich.