Abstract
SUMMARY: Examination of detrital quartz grains from the Millstone Grit sandstones (Namurian) of the southern Pennines reveals the existence of euhedral quartz overgrowths. Distinct growth stages are visible and correspond to those described by previous workers. Overgrowths in these sandstones have been observed on a number of previous occasions but this is the first study in which they are examined by scanning electron microscopy.