South-west and North of France , and South of Germany. T33 
of these two rocks ; the nests of calcareous spar, with other mi- 
nerals ; the intermixture of granular and compact limestone ; 
their small veins; the gneiss breccia; and even in part the dis- 
turbed situation of the gneiss, & c. are clearly explained, and 
even support this view. The theory supposes only the destruc- 
tion of masses, of which we see no traces, as is often the case 
with the fragments in greywacke. 
Very few sienites exist in the Pyrenees, but many masses of 
greenstone (Ophite, Palassou). These hornblendic and epidotic 
rocks contain small veins of stilbite, and of quartz, and some 
iron-pyrites and specular iron-ore, &c. Their varieties are very 
numerous, exhibiting every form between the two extremes, 
which are that sort of true greenstone called Primitive, and a 
kind of basaltic hornblendic Clinkstone ; they are massive, glo- 
bular, or rarely irregularly prismatic. Like the greenstone 
of the neighbourhood of Edinburgh, they sometimes pass into 
a green steatitic or serpentine mass. (See Palassou’s Memoire sur 
POphite). Their position is the same with the globular green- 
stone of the Fichtelgebirge, and the orbicular greenstone of Cor- 
sica ; they form among the slates large veins often running pa- 
rallel to the schist ; or rather they have filled up crevices, which 
have happened here and there, upon a certain line of direction. 
Serpentines are rare in the Pyrenees ; they seem only to be 
portions of the greenstone veins, a character which might per- 
haps distinguish them from the diallage serpentine. Horn- 
blendic or pyroxenic rocks are also uncommon, and have nearly 
the same position. At Lherz they form a large column, which, 
near its contact with the granular limestone, has formed here 
and there a kind of brecciated mass of augite and limestone. 
Old red-sandstone seems to exist in the Pyrenees, and even 
a deposit analogous to mountain limestone ; but there is no pro- 
per coal-formation. The first fleets limestone , of a greenish hue, 
and compact texture, alternates with arenaceous indurated marly 
rocks, with vegetable remains ; and rarely there are found masses 
of a kind of rauchwacke , with sulphur and bitumen, like that of 
Bex and Tarnowitz (St. Boen). The variegated sandstone or red 
marl is extended all along the base of both sides of the Pyre- 
nees, or in their valleys ; it is every where marly and argilla- 
ceous, with gypsum and salksprings, and with salt-deposits in 
