What are the major events that happened in the precambrian era?

http://www.encyclopedia.com/topic/Precambrian_era.aspx

http://science.nationalgeographic.com/science/prehistoric-world/prehistoric-time-line/

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The Precambrian Era, the longest and oldest division of Earth's geological history, spanned from the formation of the Earth about 4.6 billion years ago to the beginning of the Cambrian Period approximately 541 million years ago. Let's explore some of the major events that occurred during this vast period:

1. Hadean Eon: This earliest part of the Precambrian Era was characterized by a turbulent period of intense volcanic activity and the formation of the Earth's atmosphere and oceans. However, the lack of substantial geological records makes it difficult to determine specific events during this time.

2. Formation of the Early Continents: Tectonic activity led to the formation of primitive landmasses and continents. The supercontinent called Rodinia formed around 1.1 billion years ago and later broke apart during the Mesoproterozoic Era.

3. Origin of Life: The Precambrian Era witnessed the emergence and diversification of life. The first evidence of bacteria-like microorganisms appeared around 3.5 billion years ago in the form of fossilized stromatolites.

4. Oxygenation of the Atmosphere: Cyanobacteria, capable of photosynthesis, played a crucial role in the production of oxygen. Over time, the accumulation of oxygen led to a significant change in Earth's atmosphere, paving the way for the development of more complex life forms.

5. Ediacaran Biota: Towards the end of the Precambrian Era, roughly 635 to 541 million years ago, complex multi-cellular organisms known as the Ediacaran biota started to evolve. These organisms, which include the famous Ediacara fossils, represent some of the earliest known large, soft-bodied organisms.

To learn more about the specific events in the Precambrian Era or delve into greater detail, I recommend referring to geological textbooks, scientific articles, or educational resources focusing on Earth's geological history.