Rock
From Memory Alpha, the free Star Trek reference.
- For other uses of the term, please see Rock (disambiguation).
Rock is a naturally-occurring solid substance composed of minerals.
The preindustrial civilization of Barkon IV incorrectly believed that rock was one of the four basic elements of the universe, along with fire, sky and water. Rock was believed to be found in everything in existence, and could be felt in an object's weight and hardness. (TNG: "Thine Own Self")
