Ash from the May 18, 1980 eruption of Mount Saint Helens, collected by a family friend who happened to be working as a geologist in the area. The volume of the ash has decreased by about two thirds over the past 29 1/2 years.
Nikon D300
,Quantaray 28-90mm for Nikon AF 1/250s f/7.1 at 82.0mm iso1000
full exif