434 STEVENSON— INTERRELATIONS OF FOSSIL FUELS. 



character of the coal ; maigre and caking coals alternate, but in a 

 general way there is more of fat -coal in the higher than in the lower 

 divisions. Formation of coal began during the Kulm, which, on the 

 northern and northwestern border, contains streaks of anthracite, 

 up to 10 inches thick, associated with coaly shale. But accumula- 

 tion was unimportant prior to the Sudetic stage. 



The Waldenburg (Sudetic) beds are the Liegendzug at Walden- 

 burg; workable seams in the eastern part of this district are few, 

 thin, dirty and varying much in thickness. Just beyond Altwasser, 

 i6 seams were seen, of which 6 to 13 are workable in the several 

 mines. Farther toward the south, only one seam is workable — and 

 locally — near Tannhauser, the whole stage thins away. The seams 

 are 10 to 50 inches thick. 



The Schatzlar (Saarbriick) stage is the Hangendzug at Walden- 

 burg and is separated by a thick practically barren interval from the 

 Liegendzug. The rocks in this interval are conglomerates at base, 

 passing upward into coarse sandstone with some shale and thin 

 streaks of coal. These are overlain by the Hochwald porphyry, 

 which is 834 meters thick west from Waldenburg. The rocks be- 

 low the porphyry are the Weisstein beds of Dathe.^^ The Schatz- 

 lar stage is important chiefly near Schatzlar in the western part of 

 the field within Bohemia. Northeastward from that locality to 

 Landeshut the coals are insignificant; but toward the southwest 

 workable seams are at Gottesburg. Along the northern outcrop in 

 Prussia, the stage is unproductive, but at Waldenburg the seams are 

 numerous once more and 12 to 15 out of the 40 shown in the sec- 

 tion are workable with maximum thickness of 2 to 4 meters. But 

 here as elsewhere workable thickness never occurs in any consid- 

 erable space and important localities are practically isolated. 



The Schwadowitz and Radowenz, representing the Ottweiler, 

 are exposed in the southwestern part of the field, where the coal 

 seams are of merely local importance. The succession, descend- 

 ing, is : 

 Radowenz, enclosing 5 to 7 seams, of which 2 are workable locally ; 



31 E. Dathe, " Der Verbreitung der Waldenburger und Weisssteiner 

 Schichten in den Waldenburgen Bncht," Vcrh. d. d. Geol. Gesellsch., 1902, pp. 

 189-193. 



