from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Fine
particles depositedby the atmosphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License
The way I understand it is that, because of weather conditions (wind out of the north) there was more warning type action in the Pompeii area -- dustfall, rockfall -- which would have made the people move out sooner (explaining the lack of enough bodies in Pompeii, including the docks area).
"I think we're more likely to see the ash and dustfall travelling to
"There's not likely to be a heavy dustfall in Ireland.