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About 6 results
  • https://geo.libretexts.org/Courses/Gettysburg_College/Book%3A_An_Introduction_to_Geology_(Johnson_Affolter_Inkenbrandt_and_Mosher)/15%3A_Earth_History/15.05%3A_Proterozoic_Eon
    The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the...The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started. Photosynthesis (in organisms like stromatolites) had already been adding oxygen slowly to the atmosphere, but it was quickly absorbed in minerals.
  • https://geo.libretexts.org/Courses/Fullerton_College/Introduction_to_Earth_Science_(Ikeda)/08%3A_Earth_History/8.03%3A_Proterozoic_Eon
    The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the...The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started. Photosynthesis (in organisms like stromatolites) had already been adding oxygen slowly to the atmosphere, but it was quickly absorbed in minerals.
  • https://geo.libretexts.org/Courses/Fullerton_College/Introduction_to_Geology/08%3A_Earth_History/8.03%3A_Proterozoic_Eon
    The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the...The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started. Photosynthesis (in organisms like stromatolites) had already been adding oxygen slowly to the atmosphere, but it was quickly absorbed in minerals.
  • https://geo.libretexts.org/Courses/California_State_University_Los_Angeles/Book%3A_An_Introduction_to_Geology_(Johnson_Affolter_Inkenbrandt_and_Mosher)/10.0%3A_Earth_History/10.05%3A_Proterozoic_Eon
    The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the...The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started. Photosynthesis (in organisms like stromatolites) had already been adding oxygen slowly to the atmosphere, but it was quickly absorbed in minerals.
  • https://geo.libretexts.org/Sandboxes/ajones124_at_sierracollege.edu/Geology_of_California_(DRAFT)/06%3A_A_Brief_Geologic_History_of_California/6.02%3A_Precambrian_California_(4.6_Ga__541_Ma)
    This page discusses the Proterozoic Eon, highlighting the supercontinent Rodinia's fragmentation and its impact on California's geological landscape. It notes California's role as a passive margin dur...This page discusses the Proterozoic Eon, highlighting the supercontinent Rodinia's fragmentation and its impact on California's geological landscape. It notes California's role as a passive margin during this time, with limited tectonic activity leading to sedimentary rock accumulation. The rifting of Rodinia formed sedimentary basins and marine incursions, resulting in thick Precambrian marine sediments, which are now only partially visible in California, especially in the southeast.
  • https://geo.libretexts.org/Bookshelves/Geology/Book%3A_An_Introduction_to_Geology_(Johnson_Affolter_Inkenbrandt_and_Mosher)/08%3A_Earth_History/8.05%3A_Proterozoic_Eon
    The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the...The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started. Photosynthesis (in organisms like stromatolites) had already been adding oxygen slowly to the atmosphere, but it was quickly absorbed in minerals.

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