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Cryptic Wonders of Geological Relics is a hard crossword puzzle with 18 clues covering . Play it online for free below, or create your own crossword with our free crossword maker.

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Cryptic Wonders of Geological Relics
Challenging puzzle for experienced crossword solvers
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Across
  • 1. Oil shale named from island birthplace, with lacustrine origins
  • 2. Compact reference to a complex layering of rocks, rarely used
  • 3. Large erratic block transported by glacial wanderlust
  • 5. Fragment of oceanic crust thrust into continental collision zones
  • 6. Epoch marking recent geological time, post-glacial warmth
  • 9. Rare compacted organic sediment akin to fossilized soil
  • 11. Landscape shaped by dissolution, riddled with sinkholes and caves
  • 14. Aluminium ore formed by tropical residual weathering in plateau zones
  • 17. Windblown silt forming fertile yet fragile soil deposits
Down
  • 4. Sandstone formation tied to ancient desert sedimentation
  • 7. Fine-grained silica rock hiding microfossils in cryptic layers
  • 8. Transient sedimentary basin forming only after rare flood events
  • 10. Calcareous sedimentary bedrock forming magnificent cave systems
  • 12. Rare mineral forming stalactite-like crystalline growths in caves
  • 13. Rounded rock fragments forged in ancient fluvial bedload
  • 15. Buoyant salt structure piercing overlying strata like subterranean iceberg
  • 16. Obscure term for volatile geothermal mineral deposits named for discoverer
  • 18. Vertical lithic monolith revered as ancient architecture imitator
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