Q. Which among the following events on earth led to formation of most of the minerals found today?
Answer: Great Oxygenation Event
Notes: The Great Oxygenation Event, also known as the Oxygen Catastrophe or the Oxygen Crisis, was a major environmental change that occurred on Earth approximately 2.3 billion years ago. At this time, the atmosphere of the planet was mostly composed of methane, ammonia, and other gases, and it contained very little oxygen. However, during the Great Oxygenation Event, a dramatic increase in the levels of atmospheric oxygen occurred, as a result of the evolution of photosynthetic bacteria that produced oxygen as a byproduct of their metabolic processes. This increase in oxygen levels had a profound impact on the Earth's biosphere, as it allowed for the development of more complex forms of life and paved the way for the evolution of animals. It also led to formation of most of the minerals found today.