The deepest a live endolith has been discovered is at a depth of 3km. Their limit is unknown, and undiscovered. The threat to their life is not the underground pressure, but due to the increase in temperature. Their average temperature threshold is at around 120 degrees celsius. That temperature is found at 4.4km below the continental crust, and 7.5km below the oceanic floor.Therefore, it leaves the possibility that endolith could be discovered a depths greater than 3km. Endolith have also been found in areas of extreme cold and dryness, such as the Alps or in the desert.
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