STEVENSON— INTERRELATIONS OF FOSSIL FUELS. 445 



0-30; (7) blattering [coarse] coal containing Catamites, replaced 

 with pyrite, 0.08. 



This section certainly bears close resemblance to that of the 

 Lubna seam. The " gas coal " is usually shaly in structure but it 

 passes into true cannel. It is clearly a lens as the thickness varies 

 from a few centimeters to more than a meter. The Brandschiefer 

 contains the remarkable Niirschaner fauna described by Fritsch and 

 thought by him to be Permian, though its species differ from those 

 of the higher deposit. The flora above it .would seem to indicate 

 an earlier age as it is very closely related to the Upper Carbonifer- 

 ous. According to Dannenberg, coal like that of Niirschan occurs 

 occasionally, but locally, in the Unterflotz. The upper coal group, 

 in the Schlaner beds, is unimportant ; it contains two coal seams, but 

 these are " workable " in only limited areas. 



The Radnitz Basin, west from that of Pilsen, is very small and 

 preserves only the Kladno-Pilsner beds which have an average thick- 

 ness of about 100 meters ; the succession is Barren sandstone, at 

 most, 30 meters ; shale with two coal seams, 40 to 45 meters ; sand- 

 stone and conglomerate, very thin at times but occasionally reaching 

 60 meters. The Unterflotz is about 4 meters thick, but partings 

 make the coal dirty ; the few good layers are replaced with rock 

 toward the middle of the basin. The Hauptflotz is 10 to 11 meters 

 thick in the southern part of the basin. It is triple, but the middle 

 bench alone is persistent; the lower is often replaced with rock and 

 the upper thins away toward the northeast. 



A petty area of anthracite coal is present near Budweis in south- 

 ern Bohemia ; it was studied by Katzer*^ soon after resumption of 

 mining operations in 1890 and his results were published several 

 years later. The exposed area of the deposits, believed by Katzer 

 to be Permian, is barely 6 square miles. At the east and west the 

 underlying rocks are Archean ; at the north and the southwest, Ter- 

 tiary beds overlie the Permian. There are two divisions ; the lower 

 consists essentially of conglomerate, sandstone and arkose ; the up- 

 per has at base the coal group on which rest prevailingly red beds. 



41 F. Katzer, " Die Anthracit fiihrende Permablagerung bei Budweis in 

 Bohmen," Oesicrr. Zeitsch. f. Berg- und Hutt., Jahrg XLIIL, 1895, sep. pp. 

 1-26. 



