The deposits of the useful minerals & rocks; their origin, form, and content . consist of Coal-measures surrounded by a mantle of Zechstein, Bunter, and other youngerformations. In this district also, the iron deposits are associated with theZechstein, of which, along the northern outline of the Hiiggel and thesouthern outHne of the Schafberg, the limestone has been altered just asat Kamsdorf and Schmalkalden. 842 OEE-DEPOSITS The Schafberg forms a subsidiary fold of the large Hercyiiian mainfold. The Zechstein lying upon the Coal-measures consists of the basalconglomerate, the 0-75 m. thick K
The deposits of the useful minerals & rocks; their origin, form, and content . consist of Coal-measures surrounded by a mantle of Zechstein, Bunter, and other youngerformations. In this district also, the iron deposits are associated with theZechstein, of which, along the northern outline of the Hiiggel and thesouthern outHne of the Schafberg, the limestone has been altered just asat Kamsdorf and Schmalkalden. 842 OEE-DEPOSITS The Schafberg forms a subsidiary fold of the large Hercyiiian mainfold. The Zechstein lying upon the Coal-measures consists of the basalconglomerate, the 0-75 m. thick Kupferschiefer which hei-e only containstraces of copper, and thin-layered dolomitic hmestone, this last constitut-ing the principal mass of the formation. The district is traversed by strike-and dip faults, these being particularly noticeable along the southernoutline of the Schafberg. The iron deposits are associated with the thin-layered dolomitic hme- WE 7ZZA Carbon, Zechstein Bunter Muschclkalk Heuper Brown Jura White Jura MunderMaris,We aid en ^eocomt Diluvium Affuvit. /• .? • Fig. 376.—Geological plan of the Hiiggel district. Scale 1: 75,000. Haack. stone, from the material of which however they are sharply consist of irregular pockets of Hmonite which, though sometimes buta few metres in size, may at times be more than 100 metres. Such arefound right around the Schafberg. Concerning their extent in depth verylittle is known as the deepest workings are but 20 m. below the limestone in which the masses occur is well bedded, the separatelayers being 5-15 cm. in thickness and dipping 20°-35° to the in the immediate neighbourhood of the ore is it at all ferruginous,displaying then chimneys or pipes from finger to arms thickness, thesebeing occasionally filled with loose sand. Intercalated with the ore are THE METASOMATIC IRON DEPOSITS 843 beds of silica, so that, unlike that at the Hiiggel, this ore contains someinsoluble residue.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
