kalkflis

Etymology
, related to German

Noun

 * 1) a (slice of flat) limestone, in particular one with natural (flat and smooth) surface
 * 2) a layer of limestone (as part of the bedrock)
 * 3) gravel (grain circa 2-6 mm) of limestone (used for sanding on snow)
 * 1) a layer of limestone (as part of the bedrock)
 * 2) gravel (grain circa 2-6 mm) of limestone (used for sanding on snow)

Usage notes
Often treated as the uncountable name of a substance, but sometimes individual stones are counted, where each stone is a.