The deposits of the useful minerals & rocks; their origin, form, and content . ediments near 1 ,000. Dechen. synclines in a Muschelkalk depression. The foot-wall of the ore-bed isformed by a milky-white, plastic. Pliocene clay containing numerouspea-sized limonite concretions often in contact with one another. In bothhanging-wall and foot-wall a gradual merging into non-metalliferous claymay be observed. The bed itself strikes north-south, dips towards thewest, and is 1-2-5 m. thick. The hanging-wall consists of a 3-10 m. thick,greasy, white clay ; quicksand ; and Diluvium. L
The deposits of the useful minerals & rocks; their origin, form, and content . ediments near 1 ,000. Dechen. synclines in a Muschelkalk depression. The foot-wall of the ore-bed isformed by a milky-white, plastic. Pliocene clay containing numerouspea-sized limonite concretions often in contact with one another. In bothhanging-wall and foot-wall a gradual merging into non-metalliferous claymay be observed. The bed itself strikes north-south, dips towards thewest, and is 1-2-5 m. thick. The hanging-wall consists of a 3-10 m. thick,greasy, white clay ; quicksand ; and Diluvium. Lepsius regards the clayas the residue from dissolved limestone, to which limestone also he w^ouldrefer the iron. In any case these are syngenetic deposits occurring in theform of beds, and presumably they are of considerable extent. According THE BEAN-ORE BEDS 993 to an early analysis, the iron content of the unwashed ore is about 48-4per cent, with 13 per cent of insoluble residue ; the phosphorus is —In Spite of their great extent these deposits of this. y^^y/A Properhu of the^ Hollfeld C9 ]^\\ii\\Property of t-he^^^^^?^lMaximilian Works. Rai/ways com-pleted or in consfrucHon Railways projected Fig. 405.—The Albian beiin ore iron-field in the Francoiiian Alb. ore are probably only payable in few places. They are found as primarydeposits upon the Tertiary Cerithiimi-, Corhicula-, and Hydrohia lime-stones, and the Cyrena marls of the Mainz basin. Gravel-deposits fromthem are met in the valley alluvions and in the boidder accumulations, etc., 994 ORE-DEPOSITS which occur at the base of the loess, a calcareous surface clay typicallydeveloped on the Rhine. The deposits appear to be poor throughout andconsequently have been but little investigated. The ore upon the limestonehas been worked in places for a thickness of 0-3 to 2-5 m. ; the Alluviumdeposits are much thinner. The ore exhibits no concretionary structure,but occurs rather as agg
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
