Blasted "Muck"

Muck is one of the terms in mining that is used to describe the rocks being brought out of a mine.  The photo is taken on "blasted" muck---rocks that have been drilled and blasted for removal.  Sampling is done to determine if the rocks are mineral bearing and then marked, in this case physically in red/blue sprayed lines, to be either processed or placed into a waste rock dump.