The characteristics of crystal growth from the melt by a Czochralski‐type technique under rotation were investigated with experimental arrangements in which the thermal and rotational axes did not coincide. A pronounced type of impurity heterogeneity was studied in particular. It was attributed to a periodic remelt process associated with rotation and was shown to be a limiting case of the normally observed rotational striations. A theoretical analysis is presented which accounts for the observed experimental results. According to this analysis the microscopic growth rate of the “core” region in crystals pulled in the 〈111〉 direction is constant, whereas the microscopic growth rate of the “off core” region undergoes pronounced periodic fluctuations as a result of the thermal asymmetry of the experimental arrangement.