Yosemite National Park Rock Slide
10 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 process has been the dominant force shaping the granite extrusions of Yosemite Valley since the glaciers retreated?

  • Erosion
  • Melting
  • Exfoliation (correct)
  • Intrusion
  • What is the chief geologist, Stock, speculating as a possible cause for the cracks in Half Dome to snap?

  • Rainfall (correct)
  • Sun exposure
  • Glacier activity
  • Magma intrusion
  • What caused the tough, granite intrusions like Half Dome to be exposed over time?

  • Magma bubbles reaching the surface
  • Erosion by rainfall
  • Exfoliation process
  • Retreat of glaciers (correct)
  • What led to the formation of intrusions like Half Dome in Yosemite Valley?

    <p>Magma bubbles pushing through layers of continental crust</p> Signup and view all the answers

    What process contributed to the formation of peaks like Half Dome and El Capitan in Yosemite?

    <p>Glacial erosion</p> Signup and view all the answers

    What caused a pair of climbers to notice a massive section of missing rock on Half Dome?

    <p>They noticed a big dirt outline where the ledge was supposed to be.</p> Signup and view all the answers

    Why did nobody notice when the 5 million pound slab slid off the face of Half Dome?

    <p>Rock falls are so common in Yosemite that it went unnoticed.</p> Signup and view all the answers

    What is the primary cause of the numerous rock falls in Yosemite Valley?

    <p>Exfoliation resulting from unique geologic processes.</p> Signup and view all the answers

    When did the North American plate start overriding the Pacific plate, leading to the formation of Yosemite Valley?

    <p>25 million years ago.</p> Signup and view all the answers

    What is the approximate frequency of rock falls in Yosemite Valley per year?

    <p>60 rock falls per year.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser