Precambrian Era Geologic Processes Quiz
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Questions and Answers

What was the major geologic event of the Precambrian Era?

  • Volcanic eruptions
  • Sedimentary deposition
  • Meteorite impact
  • Orogenesis (correct)
  • What is the result of orogenesis during the Precambrian Era?

  • Formation of huge mountain ranges (correct)
  • Ocean acidification
  • Global cooling
  • Mass extinction
  • How are the rocks from the Precambrian Era described due to the processes they have undergone?

  • Crystalline rocks (correct)
  • Sedimentary rocks
  • Metamorphic rocks
  • Volcanic rocks
  • What happened to the mountains after the orogenic periods in the Precambrian Era?

    <p>Long periods of denudation reduced them to near-level rock surfaces</p> Signup and view all the answers

    What is the significance of Precambrian rocks in most parts of Ethiopia?

    <p>They are found beneath all other rocks, forming the basement rocks</p> Signup and view all the answers

    What limited our knowledge of the events in the Precambrian Era?

    <p>Remoteness in time and absence of well-preserved fossils</p> Signup and view all the answers

    Which geological process was the major one during the Paleozoic Era?

    <p>Denudation</p> Signup and view all the answers

    Where are Precambrian rocks found exposed in the southern part of the country?

    <p>Guji, southern Omo, and parts of southern Bale and Borena</p> Signup and view all the answers

    During which geological period did the sea invade the land starting from Somalia and Ogaden?

    <p>Late Triassic</p> Signup and view all the answers

    Which region is NOT mentioned as a location where Precambrian rocks are found exposed?

    <p>Eastern Hararghe</p> Signup and view all the answers

    What type of rock is associated with the flourishing of marine life during the Mesozoic Era?

    <p>Lime</p> Signup and view all the answers

    What characterized the Mesozoic Era geologic processes?

    <p>Alternate slow sinking and rising of the landmass</p> Signup and view all the answers

    What was formed at the end of the major geological process during the Paleozoic Era?

    <p>'Peneplained' surface with inselbergs here and there</p> Signup and view all the answers

    In which part of the country were sediments transported southward and eastward to form continental and marine deposits, respectively?

    <p>Northern part</p> Signup and view all the answers

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