Continental Rifting and Lithosphere Driving Forces
17 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the type of rock generally produced at oceanic divergent plate boundaries?

  • Granitic rocks
  • Sedimentary rocks
  • Basaltic rocks (correct)
  • Peridotite rocks
  • Where are hotspots most likely to occur?

  • Divergent plate boundaries
  • Intraplate settings (correct)
  • Continental arcs
  • Intrusive igneous rocks
  • Which type of rock is commonly formed at continental rifts?

  • Silicic rocks (correct)
  • Andesitic rocks
  • Plutonic rocks
  • Granitic rocks
  • What is the primary rock type associated with the Mid-Atlantic Ridge?

    <p>Peridotite rocks</p> Signup and view all the answers

    What is the percentage estimate of basic (basaltic) melts generated at modern divergent plate boundaries?

    <p>62%</p> Signup and view all the answers

    What type of rocks are typically found at convergent plate boundaries?

    <p>Granodiorite, diorite, gabbro, and tonalite</p> Signup and view all the answers

    Which type of rocks are associated with the Columbia River basalts?

    <p>Alkalic rocks</p> Signup and view all the answers

    What is the spectrum of possible volcanic rock types near convergent plate boundaries?

    <p>Quartz diorite, diorite, granite, andesites</p> Signup and view all the answers

    What influences the melting behavior of mantle peridotite at convergent margins?

    <p>Composition (continental vs oceanic), fractionation processes</p> Signup and view all the answers

    What type of rocks are referred to as trondhjemite near convergent margins?

    <p>Silicic rocks</p> Signup and view all the answers

    What process lowers the melting temperature of mantle peridotite at convergent boundaries?

    <p>Flux melting releasing volatile vapors</p> Signup and view all the answers

    What types of lava are erupted in the East African rift system?

    <p>Alkali basalt, phonolite, trachyte, rhyolite, and carbonatite</p> Signup and view all the answers

    Which of the following ancient rifts is mentioned in the text?

    <p>Rhine Graben and Oslo Graben</p> Signup and view all the answers

    What is the driving force behind the lithospheric extension that leads to the development of continental rifts?

    <p>Upwelling of hot plumes generated by the return convective loop of downgoing oceanic lithosphere</p> Signup and view all the answers

    Where does bimodal volcanism occur according to the text?

    <p>Continental rifts and hotspots underlying lithosphere</p> Signup and view all the answers

    What type of volcanism involves the occurrence of both basalt and rhyolite at continental rifts?

    <p>Bimodal volcanism</p> Signup and view all the answers

    Which volcanic rocks are referred to as silicic rocks in the text?

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

    More Like This

    Offshore Area of Libya Geology
    12 questions
    Continental Glaciation Overview
    19 questions
    Continental Drift and Plate Tectonics
    17 questions
    Use Quizgecko on...
    Browser
    Browser