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Updated: May 22, 2025
From Hanover he removed to Pittsburgh, where he operated in provisions until 1845. In that year there was much excitement over the mineral discoveries on the south shore of Lake Superior. The Indian titles to the mineral lands on that lake had been but a short time before completely extinguished, and the surveys of Dr. Houghton were bringing the cupriferous riches of the region into notice.
Not only has the cupriferous wealth of Lake Superior directly enriched many Cleveland citizens who interested themselves in its production, but it has led to the establishment of a large and steadily increasing commerce between Cleveland and Lake Superior.
The meridian altitude of the fourth day must have been reached where for the first time the covering of vapor and clouds of the earthly atmosphere permanently parted, and sun, moon, and stars became visible: and geology finds this time in the period which lies between the carboniferous period and the trias in the Permian period, as it is called in England, in the dyas of the fossiliferous and of cupriferous slate and Zechstein, as we call it in Germany.
Determined that the Khedive should have something for his money, Burton and his company had, to use Mrs. Burton's expression, "returned triumphantly," with twenty-five tons of minerals and numerous objects of archaeological interest. The yield of the argentiferous and cupriferous ores, proved, alas! to be but poor. They went in search of gold, and found graffiti!
The formation was well studied by the miners of that country a century ago as containing a thin band of dark-coloured cupriferous shale, characterised at Mansfield in Thuringia by numerous fossil fish. To the limestone they gave the name of Zechstein, and to the marl-slate that of Mergel-schiefer or Kupfer- schiefer.
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