392 REY. A. IRVING ON THE DYAS (PERMIAN) 
and very slightly is the uniform horizontality of the Bunterschiefer, 
as shown in the drawings, departed from. 
(4) In the quarry No. 7 (fig. 2), two great fissures have been formed 
in the dolomite, one of which is five feet wide, and its bottom is not 
exposed in the quarry. ‘These are filled with a brecciated accumu- 
lation of débris, partly fragments of the Rothliegende, partly frag- 
ments of the dolomite itself; so that the latter was not only depo- 
sited, but even indurated, prior to the deposition of the superjacent 
Bunter. 
(5) In some places the Bunter is as completely arenaceous and as 
mottled as the Lower Bunter Sandstone of the Nottingham country ; 
and in a fresh section the mottled character prevails throughout the 
series more or less. 
(6). Quarry No. 6 (fig. 3) gives by far the most complete example 
of the succession, as it includes a higher member of the Bunter 
series. The latter corresponds with the “ Pebble-beds” of the 
Middle Bunter of England, except that itis redder, and the contained 
fragments are almost all angular and subangular fragments of 
vein-quartz (with an occasional angular fragment of dolomite), 
derived, along with the highly micaceous sands of the sandstones 
below, from the old gneiss which is exposed over such a large tract 
of country not far from here, and all the way to and beyond Frei- 
berg. 
The dolomitic conglomerate shows the enormous waste which the 
dolomites of the Zechstein were undergoing in early Triassic times. 
The dolomite occurs in it in the form of rounded transported boulders, 
for the most part imbedded in a red marly matrix, without any 
signs which I could perceive of concretionary growth; and this 
structure comes out in the clearest possible manner where the con- 
glomerate has suffered weathering on the face of the quarry. 
In Quarry No. 2 (fig. 7} the thick line represents a deposit of black 
bog-iron ore. The limestone is stained black, sometimes for several 
inches from the surface, and the smaller joints are filled with black 
ochreous matter. The erosion of the dolomite appears in this case 
to have gone on under a morass. The lowest Lettenschiefer are 
very marly here; colour varying through light grey, yellow, and 
light purple, to the bright red of the Sandschiefer above. 
The evidence taken altogether in this district of the west of 
Saxony agrees with the observations of Herr A. Dittmarsch at Ostrau 
to the east, and points even in a more marked manner to a break in 
time between the Zechstein and Bunterschiefer. 
Dr. Liebe of Gera informs me that the extensive erosion of the 
Zechstein dolomites, which I have described above, and which Herr 
A. Dittmarsch has described at Ostrau, is generally to be observed 
in the old Saxon country, wherever the upper limit cf the Zechstein 
is to be seen. 
Space does not allow me todo more than suggest a reference here 
to the section given in Credner’s Geology *, across the Triassic 
* 3rd ed. Leipzig, 1876, fig. 244, p. Fe This seems to be regarded by 
Credner as a typical section. 
