. Transactions . 346 THE GENESIS OF ORE-DEPOSITS. Description of Figures. Fig. 1.—Erosion of a channel in rock-salt, at Maros Ujvar,Transylvania. I, impermeable rock ; S, rock-salt; H, hydrostatichead of vadose circulation. Figs. 2 and 3.—Course of vadose circulation, as affected by thenature of the rocks. S, soluble, I, insoluble rock ; H, hydrostatichead ; a, entrance, z, outlet; a b c z, natural curve of water-circula-tion, if I did not intervene; a d z, actual path under or over I. Fig. 4.—Geode o^ Eisenopal (jasp-opal), showing the filling of acavity in which air or gas is present, beside
. Transactions . 346 THE GENESIS OF ORE-DEPOSITS. Description of Figures. Fig. 1.—Erosion of a channel in rock-salt, at Maros Ujvar,Transylvania. I, impermeable rock ; S, rock-salt; H, hydrostatichead of vadose circulation. Figs. 2 and 3.—Course of vadose circulation, as affected by thenature of the rocks. S, soluble, I, insoluble rock ; H, hydrostatichead ; a, entrance, z, outlet; a b c z, natural curve of water-circula-tion, if I did not intervene; a d z, actual path under or over I. Fig. 4.—Geode o^ Eisenopal (jasp-opal), showing the filling of acavity in which air or gas is present, besides the liquid. Fig. 5.—Diagrammatic representation of deposits in a limestonecavern. (Deposits white; empty space, black.) Fig. 6.—Division of ground-water by fissures and permeablestrata. Fig. 7.—Conventional representation of an artesian well. Fig. 8.—Spring-mounds at Arczo near Korond, in Transylvania. Fig. 9.—Upward erosions in building-stone in the walled pit ofa spring at BradUy j PaaUt, Engr-a, 348 THE GENESIS OF OEE-DEPOSITS. Description op Figures. Fig. 10.—Deposition of cinnabar and opal in basalt at SulphurBank, Cal. Sketch at the surface by F. Posepny. Fig. 11.—Similar deposition at the same mine, in sandstone, atgreater depth (J. Le Conte). Fig. 12.—Carlsbad Sprtidehtem, Fig, 13.—Pisolite with pyrite crusts, from Hammam Meskoatine, Figs. 14, 15 and 16.—Pisolites formed by dripping solutions atOfFenbanya. Fig. 17.—Cocarde-ores, a correction of the illustrations of Cotta[Erzlagerstdttenlehre, Emter Theil, 33) and Daubree {Les eaux auxepoques anciennes^ p, 64). Fig. 18.—Gold specimen from the Katrontza ore-body, Veres-patak. Fig. 19.—A crusted rock-nucleus, from Raibl. Fig. 20.—Boiler-scale. Figs. 21 and 22.—Fragments of rock and older crusts, surroundedby later crusts, from Zellerfeld (J. C. L. Schmidt). Fig. 24.—Gold-aggregates, surrounded by crusts of calcite, rhodo-nite, siderite and quartz, from the
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