164 Mr Menge’s Account of his Minerahgical 
the rocks of Iceland rest. The amygdaloid formation rises 
more from Eskifiord to Berufiord; and, like the formation which 
ends in wacke at Eskifiord, it also ends in amygdaloid at Diu- 
pavog in Berufiord. In the Breiddal, I saw different varieties 
of iron-basalt, which contained, in place of zeolite, frequently 
arragonite. I found the first traces of cross-stone in cavities of 
amygdaloid, in the heath of Gaga, associated with chabasite. 
Whilst collecting specimens of the different kinds of zeolite on 
the south side of Berufiord, I found the following beds of amyg- 
daloid, with bases of wacke : 
1. Compact wacke. 
Wacke-amygdaloid, in which the cavities contain quartz. 
‘ 3. Wacke-amygdaloid, with quartz, stilbite, and apophyllite. 
4. Wacke-amygdaloid, with stilbite and green-earth. 
5. Wacke-amygdaloid, v/ith stilbite, much green-earth, and 
asbestous-zeolite or hair-zeolite. 
6. Wacke-amygdaloid, with stilbite and mesotype. 
7. Wacke-amygdaloid, with mesotype. 
8. Wacke-amygdaloid, with mesotype, stilbite, and hair-zeo- 
lite. 
9. Calcedony-wacke at the foot of the Bulandstind. 
From Berufiord I visited Hammersfiord, the most south-eas- 
tern part of Iceland I had an opportunity of examining. Here 
I saw a great bed of clinkstone-porphyry in the amygdaloid 
formation. This bed is exposed at Rode-Skiuda, on the north 
side of Hammersfiord ; and here I had the good fortune to find 
a series of rocks of the same nature of those which I was forced to 
pass without examination in the valley of Vide. Below a great 
bed of clinkstone-porphyry, I found a bed about six feet thick of 
pitchstone-porphyry, which passed on the one side into obsidian, 
on the other into pearlstone-porphyry. The bed dipped to the 
N. W. under an angle of 40°, and was traversed by small veins of 
compact basalt. The pitchstone is often amygdaloidal, and con- 
tains sphserulite*, balls of calcedony, jasper, magnetical pyrites, 
seldomer zeolite, and calcareous-spar, and only in the places where 
it touches amygdaloid. There is a small bed of white slaty clay 
between the porphyry-slate and the pitchstone. This bed of 
* Spheerulite occurs in the pitchstones of Arran, which very much resemble 
those of Hammersfiord, — E». 
