Continental
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All of the above except "formed from the remains of dead plants."
Metamorphic rock is formed by heat and pressure from any type of rock (igneous or sesimentary) and is part of the rock cycle.
The full moon cycle (from one phase to the same phase again), from start to finish, is generally 28 days. That being said, from one phase to its opposite, or one half-cycle, would be approximately 14 days.