Dwarf planet Ceres: Origin in the asteroid belt? https://www.mpg.de/23435699/dwarf-planet-ceres-origin-in-the-asteroid-belt
reason: the discovery of light-coloured ammonium deposits in Consus Crater could have – been lifted to the surface by Ceres‘ cryovolcanism and may not have originated in
Freezing vulcanism Ceres appeared to have been the scene of unique cryovolcanism