SCIENCE|natural and applied sciences|earth sciences|geology
- iarnchloch Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- ironstone
- en
- Definition sedimentary rock, either deposited directly as a ferruginous sediment or created by chemical replacement, that contains a substantial proportion of an iron ore compound from which iron (Fe) can be smelted commercially Reference "Wikipedia > 'Ironstone' (22.11.2022)"
- Comment "Not to be confused with native or telluric iron, which is very rare and found in metallic form, the term ironstone is customarily restricted to hard, coarsely banded, non-banded, and non-cherty sedimentary rocks of post-Precambrian age. The Precambrian deposits, which have a different origin, are generally known as banded iron formations.Ironstone as a source of iron.Ironstone, although widespread, is a limited source of iron. Historically, most British iron originated from ironstone, but it is now rarely used for this purpose because it is far too limited in quantity to be an economic source of 'iron ore'."