As limestone, calcium carbonate is a biogenic rock, and is more compacted than chalk. As marble, calcium carbonate is a coarse-crystalline, metamorphic rock, which is formed when chalk or limestone is recrystallised under conditions of high temperature and pressure.
Definition: A wavefunction is a function describing the probability of a particle's quantum state as a function of position, momentum, time, and/or spin. Wavefunctions are commonly denoted by the variable Ï.
When people say that the wavefunction collapses, that means that they don't understand how quantum mechanics works. But that's ok, because no one really understands it. First of all, if you don't know what a quantum state is, please read the answers here: In layman's term, what is a quantum state?