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Questions and Answers
What are the three parts of the Precambrian Eon?
What are the three parts of the Precambrian Eon?
- Hadean, 2. Archean, 3. Proterozoic
What are Hadean rocks largely consisting of and where are they found?
What are Hadean rocks largely consisting of and where are they found?
Granular zircons from one locality in Western Australia
When did the Hadean Eon begin and end?
When did the Hadean Eon begin and end?
Began 4.6 billion years ago, ended 4 billion years ago
What term did Preston Cloud coin to label the period before the earliest-known rocks on Earth?
What term did Preston Cloud coin to label the period before the earliest-known rocks on Earth?
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What did the Earth's early Hadean atmosphere contain and what eventually formed?
What did the Earth's early Hadean atmosphere contain and what eventually formed?
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What geological eras make up the Proterozoic Eon?
What geological eras make up the Proterozoic Eon?
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What is the significance of the Paleozoic Era?
What is the significance of the Paleozoic Era?
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During which period did the first flowering plants appear?
During which period did the first flowering plants appear?
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What is the Mesozoic Era also known as?
What is the Mesozoic Era also known as?
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What caused the rise of multicellular organisms during the Proterozoic?
What caused the rise of multicellular organisms during the Proterozoic?
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Study Notes
Precambrian Eon
- The Precambrian Eon consists of three parts: Hadean, Archean, and Proterozoic Eons.
Hadean Eon
- Hadean rocks are largely consisting of zircon crystals and are found in Western Australia.
- The Hadean Eon began around 4.5 billion years ago and ended around 4 billion years ago.
- Preston Cloud coined the term "Hadean" to label the period before the earliest-known rocks on Earth.
Early Earth's Atmosphere
- The Earth's early Hadean atmosphere contained no oxygen and eventually formed methane and ammonia.
Proterozoic Eon
- The Proterozoic Eon consists of three geological eras: Paleoproterozoic, Mesoproterozoic, and Neoproterozoic.
Paleozoic Era
- The Paleozoic Era is significant because it saw the rapid diversification of life on Earth.
Phanerozoic Eon
- During the Silurian Period, the first flowering plants appeared.
Mesozoic Era
- The Mesozoic Era is also known as the Age of Reptiles.
Rise of Multicellular Organisms
- The rise of multicellular organisms during the Proterozoic was caused by the increase in oxygen levels in the atmosphere.
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Description
Test your knowledge on the history of Earth through the Precambrian Period, including its subdivisions like Hadean, Archean, and Proterozoic. Learn about the significant events that shaped Earth during this extensive period.
