The original rock ( protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.
These are clouds of gas or plasma that encircle a planet and have been found to be produced by the interaction of the satellite or the atmosphere of the moon form the interaction of the magnetic fields of the planet.
They are produced by the ionization of the oxygen and sulfur from the Jupiter's atmosphere these particles have centered around the orbits of the Io moon.
<u>They have been also found on the Europa moon and these have been also found on the moons on the Saturn near the orbits of the titans. Traces of the ions have been found, named as smoke rings.</u>
