Geology of Mountain Formation
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Questions and Answers

What is the primary evidence that suggests the Appalachian Mountains and the Caledonian mountains were once part of the same mountain chain?

  • Glacial movement patterns in the Northern Hemisphere
  • Similarities in mountain formation processes
  • Fossil records of marine animals
  • Geological evidence of similar rock types (correct)
  • What can be inferred from the fact that fossils of Lystrosaurus have been found in South America, Africa, India, Antarctica, and Australia?

  • Lystrosaurus was a marine animal that could migrate across oceans
  • Lystrosaurus was a flying reptile that could migrate across continents
  • These continents were once connected by land bridges (correct)
  • The continents have remained in their current positions for millions of years
  • What is the significance of the similar glacial grooves found along the coastlines in the Southern Hemisphere?

  • They are evidence of independent glacial formation on each continent
  • They support the theory of continental drift and Pangea (correct)
  • They were formed by glaciers moving in different directions
  • They are a result of changes in sea levels
  • According to Wegener's theory, what was the original position of the continents?

    <p>They were separated from the ocean floor</p> Signup and view all the answers

    What is the primary reason why it is difficult to conclude that multiple glaciers formed simultaneously and independently on separate continents?

    <p>The glaciers would have required a completely frozen world</p> Signup and view all the answers

    What is the approximate time interval between the reversals of the Earth's magnetic field?

    <p>300,000 years</p> Signup and view all the answers

    What is the name of the process by which the seafloor is spreading apart?

    <p>Sea floor spreading</p> Signup and view all the answers

    What is the main reason for the movement of the tectonic plates?

    <p>Convection deep within the Earth</p> Signup and view all the answers

    What is the term used to describe the regions where volcanic materials rise from the asthenosphere into the lithosphere?

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

    What is the difference between the continental crust and the oceanic crust?

    <p>Continental crust is less dense, oceanic crust is denser</p> Signup and view all the answers

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