Mesozoic Era Geologic Processes Quiz
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Questions and Answers

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

  • Lime (correct)
  • Sands
  • Gypsum
  • Shale
  • What process affected the whole present-day Horn of Africa and Arabian landmass during the Mesozoic Era?

  • Volcanism
  • Deposition
  • Epeirogenesis (correct)
  • Erosion
  • What type of rock was compacted to form sandstone during the Mesozoic Era?

  • Sands (correct)
  • Gypsum
  • Lime
  • Shale
  • Which sea invaded the land starting from Somalia and Ogaden during the late Triassic period?

    <p>Arabian Sea</p> Signup and view all the answers

    What did the subsidence of the land during the Mesozoic Era lead to?

    <p>Invasion of sea</p> Signup and view all the answers

    What process occurred with the retreat of the sea in the Horn of Africa?

    <p>Deposition of clay, silt, sand conglomerate</p> Signup and view all the answers

    What are Mesozoic rocks considered to have the greatest potential for?

    <p>Oil and gas deposits</p> Signup and view all the answers

    Which rock surface formations were laid upon the Precambrian rock surface by the end of the Mesozoic Era?

    <p>Adigrat or lower sandstone, Hintalo limestone, Upper Sandstone</p> Signup and view all the answers

    Which direction did the age and thickness of the Sandstone layers vary during the transgression and regression of the sea?

    <p>Southeast - Northwest</p> Signup and view all the answers

    Where are the Mesozoic rocks found in Ethiopia?

    <p>Southeast lowlands</p> Signup and view all the answers

    What were the major geologic activities that occurred during the Cenozoic Era?

    <p>Uplifting of the Arabo-Ethiopian landmass and formation of the Rift Valley</p> Signup and view all the answers

    What effect did the tectonic and volcanic activities have on Ethiopia and the Horn of Africa during the Cenozoic Era?

    <p>Important effect in making the present-day landmass</p> Signup and view all the answers

    What was laid over the Hintalo limestone at last before the emergence of the land from the sea?

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

    Where were transitional formations like gypsum and shale interbedded during the Mesozoic Era?

    <p>Above and below the Hintalo limestone</p> Signup and view all the answers

    What is covered by the Mesozoic rocks in most parts of Ethiopia?

    <p>Overlaid by Cenozoic rocks</p> Signup and view all the answers

    Where are old marine sediments extensively found in Ethiopia?

    <p>Southeast lowlands</p> Signup and view all the answers

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