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Updated: July 10, 2025
It contains, as substances accidentally disseminated in the mass, brown iron-ore, spathic iron, even rock-crystal. As subordinate layers it contains numerous strata of carburetted and slaty marl with pyrites; quartzose sandstone, alternating with very thin strata of clayey slate; gypsum with sulphur near Guire in the Golfo Triste on the coast of Paria.
The epoch we are now referring to was one of economic importance; as, towards its close, there was an extensive deposition of pisolitic iron-ore over the floor of the lake, sometimes to the depth of two or three feet. This ore has been extensively worked in recent years. Cliff section above the Giant's Causeway, coast of Co.
The enthusiasm faded away from his eyes, and the look of a man who is thinking took its place. Presently, in a hesitating, undecided way, he said: "Well, I it don't seem quite enough. That that is a very valuable property very valuable. It's brim full of iron-ore, sir brim full of it! And copper, coal, everything everything you can think of! Now, I'll tell you what I'll do.
It is only further to be observed, that all the arguments which have been already employed, concerning mineral concretions from a simply fluid state, or that of fusion, here take place. I have septaria of this kind, in which, besides pyrites, iron-ore, calcareous spar, and another that is ferruginous and compound, there is contained siliceous crystals; a case which is not so common.
The mica, with large folia, lies in the direction of the dip of the strata. I found in the primitive limestone a great many crystallized pyrites, and rhomboidal fragments of sparry iron-ore of Isabella yellow.
The later Romans seem to have procured their iron-ore from the island of Elba and Spain, Gaul, and other provinces, and to have imported ware of all kinds, especially the finer sorts, from various parts of the Empire; the commoner kinds, such as the dolia or large vessels for storing wine and oil, were certainly made in Rome in the second century B.C., for Cato in his book on agriculture remarks that they could be best procured there.
About this time some very large columns of smoke were seen rising from the low lands. At sun-set, the preceding night, when we were close under Cape Upstart, the variation was nearly 9° E., and at sun-rise this day, it was no more than 5° 35'.; I judged therefore that it had been influenced by iron-ore, or other magnetical matter, contained under the surface of the earth.
The great Tayeh iron-mines, although entirely Chinese-owned, were already being tapped to supply iron-ore for the Japanese Government Foundry at Wakamatsu on the island of Kiushiu.
In our own country, we are finding metalliferous deposits: vast accumulations of lead-ore have come to light in Wales, which are said to contain six ounces of silver, and fifteen hundredweight of lead to the ton; and in Northamptonshire, an abundant and timely supply of iron-ore has just been met with.
«Thus, an heterogeneous mass of freestone, coals, iron-ore, etc. which forms the east side of Ballycastle Bay, and appears quite different from the common fossils of the country, may be traced also directly opposite, running under Rathlin, with circumstances which almost demonstrably ascertain it to be the same vein.
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