Proterozoic Eon Group Project Presentation PDF

Proterozoic Presented by Group 3 Proterozoic Eon Proterozoic means 'earlier life'. This name suggests that organisms in this eon were simpler and smaller than today's. It comes after the Archean eon and before the Cambrian period. It is also the longest geologic eon 2.5 billion yea...

Proterozoic Presented by Group 3 Proterozoic Eon Proterozoic means 'earlier life'. This name suggests that organisms in this eon were simpler and smaller than today's. It comes after the Archean eon and before the Cambrian period. It is also the longest geologic eon 2.5 billion years ago, ended at 541 million years ago. Era & Period  Three Eras: A. Paleoproterozoic - 2.5 billion to 1.6 billion years ago Era & - This is the first era of the Proterozoic Eon Period Paleoproterozoic periods: 1. Siderian 3. Orosirian 2. Rhyacian 4. Statherian  1. Great oxidation Paleo- Proterozoic is 2. Glaciation events known for: 3. Banded-Iron Formations Paleo- 4. Early Eukaryotes Proterozoic is known for: 5. Continental's Crust development  Three Eras: B. Mesoproterozoic Era & - 1.6 billion to 1 billion years ago - referred as boring billion stage Period of Earth history Mesoproterozoic periods: 1. Calymmian 2. Ectasian 3. Stenian  1. Super continent Rodinia Meso- 2. The break-up of the Proterozoic is Columbia Continent known for: 3. Early Sexual reproduction  Three Eras: C. Neoproterozoic Era & - the third of three subdivisions of the Proterozoic Eon Period - 1.6 million to 541 million years ago Neoproterozoic Period 1. Tonian 2. Cryogenian 3. Ediacaran  1. Super continent Rodinia break up Neo- Proterozoic is 2. Ediacaran Fauna known for: 3. Environmental Changes  ♦ Early Microbial Life: Dominated by single-celled organisms, mainly bacteria and archaea. Life Cyanobacteria played a key role in oxygen production, contributing forms to the Great Oxygenation Event.  ♦ Stromatolites Structures formed by layered microbial communities, primarily Life cyanobacteria. Important fossils that provide evidence of early life. forms  ♦ Ediacaran Biota: Emerged in the late Proterozoic (around 635 million years ago). Included a variety of soft-bodied, Life multicellular organisms. Examples like Dickinsonia and Charnia, which had unique body plans Forms and lived in marine environments.  Environmental Influences Environmental Influences - Factors that allowed for the creation of life. Life - Climate changes: glaciation events : rising oxygen levels Forms