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Enigmatic Earth's Hidden Marvels
Explore the rare and fascinating geological formations that shape our planet's hidden wonders in this challenging crossword.
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Across
  • 1. Dark green variety of chalcedony with red specks resembling blood
  • 3. Geological period linked with Australian rock formations
  • 5. Rare mineral-rich geological formation often containing rare earth elements
  • 7. Landscape formed from dissolution of soluble rocks like limestone
  • 11. Castle-like rock formations made from volcanic ash deposits
  • 14. Sandstone formation important to geological studies in Africa
  • 16. Flat expanse of ground covered with salt and other minerals
  • 17. Hot spring that periodically erupts with steam and water
Down
  • 2. Tall, thin spire of rock formed by erosion
  • 4. Precious gemstone often found in rare sedimentary deposits
  • 6. Group of islands formed by volcanic or tectonic activity
  • 8. Rock shaped by wind-driven sand erosion in deserts
  • 9. Mineral used for radiometric dating of ancient rocks
  • 10. Lens-shaped folded rock formation
  • 12. Hard, fine-grained sedimentary rock composed of quartz
  • 13. Rare oil shale fossil-rich geological deposit found in Tasmania
  • 15. Openings near volcanoes emitting steam and gases
  • 18. Rare geological clay deposit named after an English town
  • 19. Vertical rock formation often found in desert landscapes

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