Banded Iron Formations and Evolution of the Atmosphere

The atmosphere (about 570 mya) between the evolution of the striped steel structure and the formation of the Earth from the beginning of the Cambrian era (about 570 mya) is my long years Cambrian century 4000 years ago, about 90% of the geological age includes. The rock is underexposed, many rocks are eroded or deteriorated, and fossils are rarely seen. Precambrian times are divided into three months. Hadian (4600-3800 mya, no rock record) Archean 3800-2500 mya) Proterozoic 2500-570 mya.

The complexities and contradictory arguments related to the evolution of the atmosphere and the accompanying formation of ribbon iron are difficult to emphasize. As there is no proof of the Precambrian rocks (or no record of rocks at all), this topic may not be understood in the end. However, the general consensus seems to be a condition that simultaneously favor the iron chemical deposition, the remarkable change of the atmosphere, the rapid increase of free oxygen, and the fundamental change under the conditions of more than 1,000 me and up to 1800 ma . Evolution of early life from anaerobic bacteria to aerobic cyanobacteria

A large amount of iron sediment was seen in the strip iron layer. These strata are a type of rock in which alternating thin layers of iron oxide and alternating low shale and meteorite belts. These iron bands were built 3.7 billion years ago and 1.8 billion years ago. Starting from the historical time, the iron compound mentioned is used as a pigment (compared with meteorite) and also contributes to the color of various strata. For example, Buntsandstein (Bunter, UK). In the case of German Eisensandstein (Jurassic "iron sandstone" like Donzdorf) and British bass stone, the iron pigment contributes to a number of historic buildings and a pale yellow color of sculpture. The well-known red color of Mars's surface comes from a weathered layer rich in iron oxide.

Another mechanism of the striped iron layer in the snow dome era suggests that iron is deposited from metal-rich saline near the lift zone of hydrothermal activity. Alternatively, some geochemists believe that the formation of striped iron can be formed by direct oxidation of iron by microbial anaerobic phototrophs. The iron belt in northern Minnesota is right under the thick jet layer of the collision layer of the Sudbury Basin. At the time of its formation, the Earth had a supercontinent called Colombia with a continental shelf. The asteroid (estimated 10 km) hit a water area of ​​about 1,000 m deep, about 1.85 billion years ago. The computer model shows that the tsunami is at least 1000 meters in the center and up to 100 meters at a distance of about 3,000 kilometers. A huge wave caused by shock and a large water landslide stirs the sea and carries oxygenated water from the surface to the bottom of the ocean.