Cenozoic Era Geologic Processes
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Questions and Answers

What was the major geologic activity during the Cenozoic Era that contributed to the making of the present-day landmass of Ethiopia and the Horn of Africa?

  • Quaternary volcanism and deposition
  • Elevation of the Andes Mountains
  • Uplifting of the Arabo-Ethiopian landmass and outpouring of lava flood (correct)
  • Formation of the Rift Valley
  • During which epoch did the uplifting of the Arabo-Ethiopian landmass reach a maximum height of 2,000 meters above sea level?

  • Paleocene
  • Oligocene
  • Eocene (correct)
  • Upper Jurassic
  • What characterized the uplifting of the Arabo-Ethiopian landmass during the Cenozoic Era?

  • It was of volcanic origin
  • It was epeirogenic in nature (correct)
  • It was a seismogenic character
  • It was due to glacial movements
  • Which region experienced the greatest uplift during the tectonic and volcanic activities in the Cenozoic Era?

    <p>Central Ethiopia (D)</p> Signup and view all the answers

    What geologic process resulted from the immense tectonic force that fractured the crust during the Cenozoic Era?

    <p>Outpouring of lava flood (C)</p> Signup and view all the answers

    Which comparable geological feature to the uplifting in Ethiopia is mentioned in the text?

    <p>Appalachian Mountains (C)</p> Signup and view all the answers

    What geological event led to the formation of the Ethiopian plateau?

    <p>Tensional forces from the spreading of Trap Series lava (B)</p> Signup and view all the answers

    How did the formation of the Rift Valley relate to plate tectonics theory?

    <p>It was associated with lateral crustal movements in opposite directions (D)</p> Signup and view all the answers

    What geological process is responsible for the formation of the Rift Valley?

    <p>Major rifting and faulting (A)</p> Signup and view all the answers

    How did the Red Sea and Gulf of Aden connect in the past?

    <p>Following the down-faulting of the Afar depression (D)</p> Signup and view all the answers

    What geological event characterized the late Oligocene and Miocene Epochs?

    <p>Major faulting movement (B)</p> Signup and view all the answers

    What caused the central part of the landmass to collapse and form a structural depression like the Rift Valley?

    <p>Lateral movement producing tensional forces (D)</p> Signup and view all the answers

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