Its what happens to Thread runs into very cold air, or weather that kills it, and it falls as dust,
It was noted at Sadrid Stake, mixed in with rain.
Sweepriders bring buckets to show, S'nan during the 'dud' fall in Second Pass, G'don, riders also watch. One piece of frozen Thread, was brought but the sink as it unfroze, they got rid of it. see First Fall Second Pass for Additional Infomaton
- Dragonsdawn (mention)
- Red Star Rising
- Moreta: Dragonlady of Pern