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Depending on its formation, these systems can exist in one of two primary forms: pools or caves. The primary differentiating characteristics between pools and caves is the availability of light; cave systems are generally aphotic while pools are euphotic. The difference in light availability has a large influence on the biology of a given system.
The requirements for the development of lampenflora are sufficient (artificial) light and moisture. An increase in nutrient content (e.g. fertilizer usage on land above the cave) or heat (e.g. incandescent lighting) may lead to an increase in lampenflora. The germs, seeds or spores can get brought into the cave by air, water, animals or people. [7]
The term antonym (and the related antonymy) is commonly taken to be synonymous with opposite, but antonym also has other more restricted meanings. Graded (or gradable) antonyms are word pairs whose meanings are opposite and which lie on a continuous spectrum (hot, cold).
Jabal al-Nour (Arabic: جَبَل ٱلنُّوْر, romanized: Jabal an-Nūr, lit. 'Mountain of the Light' or 'Hill of the Illumination') is a mountain near Mecca in the Hejaz region of Saudi Arabia. [1]
A cavern is another name for a cave or a large room within a cave. Cavern or The Cavern may also refer to: The Cavern Club or The Cavern, a rock-and-roll club in Liverpool, England; The Cavern, a 2005 horror film; The Cavern, directed by Edgar G. Ulmer; Caverns, a 1989 novel written collaboratively as an experiment by Ken Kesey
The Mithraeum was either an adapted natural cave, cavern, or building imitating a cave. Where possible, the Mithraeum was constructed within or below an existing building, such as the Mithraeum found beneath the Basilica of San Clemente in Rome. While most Mithraea are underground, some feature openings in the ceiling to allow light to enter, a ...
Will N. Harben's Land of the Changing Sun (1894) is a utopian fantasy set within a 100-mile wide cavern found below the Atlantic Ocean 200 years prior and settled. The settlers found the atmosphere very rejuvenating, and also build an artificial changing sun to light their world. Two balloonists, an American and an Englishman, discover this world.
The deepest known cave—measured from its highest entrance to its lowest point—is Veryovkina Cave in Abkhazia, Georgia, with a depth of 2,204 m (7,231 ft). [18] This was the first cave to be explored to a depth of more than 2,000 m (6,600 ft). (The first cave to be descended below 1,000 m (3,300 ft) was Gouffre Berger in France.)