Examples from the Web for ironstone
The upper rock-beds, especially the bed of ironstone on the top, is generally remarkably rich in fossils.The World Before the Deluge|Louis Figuier
She knew, too, that all her fascinations recoiled harmlessly from that rugged block of ironstone.Guy Livingstone;|George A. Lawrence
Behind him was a great cut-faced rock of ironstone that certainly looked auriferous.The Twins of Suffering Creek|Ridgwell Cullum
The magnet, for in Kent they call the ironstone mine, quasi mineral.
The whole park has a sombre appearance, owing to the dark soil and ironstone freely sprinkling it.Through South Africa|Henry M. Stanley