Abstract
SUMMARY: The heavy fall of dust, probably of Saharan origin, that occurred during early November 1984 was the most recent of a number of such events in Britain. Analysis of a sample of dust from north-east England produced results similar to those obtained for previous falls. The dust displayed a median particle size of 9 μ m, which, though not diagnostic, is emerging as characteristic of such material; much larger ‘aggregate’ grains were also encountered. The predominance of illite clays and iron-stained quartz grains is also consistent with earlier findings.