ironstone

/ahy-ern-stohn/US // ˈaɪ ərnˌstoʊn //UK // (ˈaɪənˌstəʊn) //

铁石,铁矿石,铁岩,铁石心肠

Definitions

n.名词 noun

1
- : any iron-bearing mineral or rock with siliceous impurities.
- : Also called ironstone china. a hard white stoneware.

The town-walls are built of flint and concrete bonded with ironstone, and are backed with earth.
Behind, and almost overhanging it, was a great krantz whose smooth ironstone wall glowed like a vast slab of red-hot metal.
The first cargo of ironstone was sent from here in 1836, when the Pickering and Whitby Railway was opened.
Examples of this are chert nodules in limestone; flint nodules in chalk; clay-ironstone balls in shale, &c.
I found the magnetic polarity to be very distinct in some of the ironstone pebbles on these rises.