Dr. Borré’s Notices of Foreign Geology. 189 
England is a deposit of this kind, alternating with the oldest 
part of the Ist floetz limestone of Werner.) The transition 
class ends with the porphyries, or the secondary class commen- 
ces with them. The porphyries and trap rocks (which Dr. 
B. considers as loca) igneous formations) appear very dif- 
ferently in many places. In Cumberland, and the Fichtels- 
gebirge the grau wacké contains masses of porphyritic 
and trap rocks, beds of reaggregated rocks of this class, 
with here and there masses of Sienite or sometimes hilloc 
often containing hypersthene, or diallage. The superior 
and inferior surfaces of these masses are often scorified— 
the d 
The coal formation is found upon the old red sandstone 
in Scotland, and Silesia; at Thorandt near Dresden and at 
Halle it is below, and in Bohemia it is in the old red sand- 
appeared during the deposition of coal, the coal field is cov- 
ered by the sandstone, and when they have appeared 
through the whole period, there you find hardly any of the 
sandstone of the coal formation, but the coal field is the 
old red sandstone. On the other hand where no porphyries 
