Speleothem

ahd-5
  • noun. A mineral deposit, such as a stalagmite or stalactite, formed in a cave from the dripping of mineral-rich water.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. Any mineral deposited in a cave by the action of water.
  • Word Usage
    "A speleothem that has been intermittently submerged in a cave on the island of Mallorca was dated to show that, historically, sea level was more than a meter above its present height."
    Synonym
    Words with the same meaning