packsand

packsand

[′pak‚sand]
(petrology)
A very fine-grained sandstone that is so loosely consolidated by a slight calcareous cement that it can be readily cut by a spade.
References in periodicals archive ?
The distance of Jurassic and carbonic coal strata is approximately 150 to 200 m which is filled with hard rock strata include packsands, siltstone, medium grained sand and conglomerate.