Show good stone from a queer deposit A street paving contractor lias has just engaged worth of dakota paving ing stone the prairie region ot of dakota is about the last place we would think ot of going to tor for stone and yet the deposit whence this stone is ia taken is said to be a most wonderful and magnificent formation it is called a quartzite granite soft when quarried and easily sawn out but hardening into a mass flinty and indes non absorbent it is pronounced by experts a perfect paving atone but tile strangest thing about it Is tho the formation from which it is taken this is found about two feet under the prairie soil surrounding sioux falls for miles and miles and N w hen the thin soil with its stunted growth of grass is stripped off there lies the rock as smooth and level as a floor the tra tract ct contains something like thirty square miles and the deposit is several everal fc hundred feet thick gliick through the center of it the tract runs the big sioux river whose channel is merely a rift in the rock a crack formed helhe by the partial splitting of 0 the whole mass the channel is lit in shape just like a letter V and the surface of tho the deposit extends lack back for several miles pred precisely ely at r right angles with the sides bides of the crevice chicago herald |