Geology of the Boulder Area

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Across
  1. 2. first major ridge east of the mountains
  2. 4. formed by tectonic stresses related to the assembly of the supercontinent Pangea and the collision of the North American and South American plate
  3. 8. oldest rock in the area, roughly 1.7 Colton years.
  4. 9. Famously used as the primary building stone for the University of Colorado Boulder
  5. 10. Much of Boulder sits on this soft, dark grey shale
Down
  1. 1. ancient 1.7 billion-year-old basement rocks and tilted sedimentary layers
  2. 3. massive slabs of titled red sandstone that were once flat river deposits pushed upright
  3. 5. Forms are formed as magma inside the earth moved upward and cooled
  4. 6. Carved the plains into the modern topography and large granite boulders the city is known for
  5. 7. defined by a dramatic transition where the Great Plains meet the Rocky Mountains