Geology of England and Wales,” &c. —- 221 
Red Marle, or New Red Sandstone, or Red Rock, or Red 
: Ground. age é 
This formation comprehends the variegated sandstone of 
Werner, and is described as “a series of marly a 
rs i 
conglomerate lowest. These beds are argillaceous, and 
argillo-siliceous, with a variable proportion of calcareous 
matter. The colours of the marle and sandstone are ofa 
red chocolate and salmon colour; exhibiting streaks of 
light blue, or verdiyris, or buff, or creamcolour, 
“Some of the sandstone beds of this formation bear so 
neara resemblance to some of the grits associated with the 
coal formation, and to the softer strata of the old red sand- 
stone underlying the mountain limestone, that a cursory 
servation of them would: often lead to fallacious conclu- 
sions. It may however be generally recognized without 
much difficulty by the following distinctive characters 3 Ist, 
its containing gypsum ; 2ndly, by the inferior consolidation 
of its st beds; 3dly, by the regularity of its stratification, 
and the general parallelism of its beds to the horizon.”’ pp- 
280 and 281. Gi 
Many other distinctive characters of this formation are 
gular Masses of granite, calcareous spar, pone! chert, 
steywacke, yellowish limestone, porphyry, preces 0! a com> 
_ The amygdaloidal trap, occurring in the same connec- 
sometimes covers, and at other times is covered, by 
augite, bron- 
