* 
Geological Society. 559 
yards by the ice, and so firmly was it fixed, that the force of the 
moving ice broke a chain cable as large as that of a 10-gun brig, and 
which had rode the Gulnare during the heaviest gales in the Gulf. 
The anchor was cut out of the ice or it would have been carried into 
deep water and lost. 
With respect to rocks being transported by icebergs, Capt. Bayfield’s 
testimony is equally conclusive, as he passed three seasons in the vi- 
cinity of the Strait of Belleisle. In an iceberg which he examined, 
boulders, gravel, and stones were thickly imbedded ; and he saw others 
which owed their dirty colour to the same cause. Some of these 
immense ice-islands, Capt. Bayfield thinks, had been detached from 
the coast very far to the northward, perhaps from Baffin’s Bay. The 
northern current brings similar masses in great numbers down the 
coast of Labrador every year, and they are very frequently carried 
through the straits, and for several hundred miles to the S.W. up the 
Gulf of St. Lawrence. 
A paper “ On the syenite veins which traverse mica slate at Good- 
land eliff and chalk at Torr Eskert, to the south of Fair Head in the 
county of Antrim,” by Richard Griffith, Esq., F.G.S., and P.G.S. of 
Dublin, was afterwards read. 
The part of Antrim to which this paper refers is situated between 
Fair Head on the north, and Cushleake mountain on thesouth. The 
base, or oldest formation of the district, consists of inclined strata of 
mica slate passing into gneiss, and containing subordinate beds of 
hornblende slate and schistose limestone. Upon the mica slate re- 
pose nearly horizontal and unconformable strata of coal measures, new 
red sandstone, and chalk ; andthe whole of these secondary deposits 
are surmounted by an overlying mass of rudely columnar trap, the 
northern extremity of which forms the magnificent promontory of 
Fair Head. 
Besides the hornblende schist, which is interstratified with the mica 
slate and dips conformably with it, there are other rocks containing 
hornblende, which appear to be imbedded in the slate, but which are 
really intruded veins. On the sea-shore at Torr Point are two of these 
veins, consisting of syenite and syenitic green-stone; and they may 
be traced passing obliquely along the face of the stupendous and, for 
the greater part, perpendicular cliff of Goodland. On the sea-shore 
they appear so regular and conformable, both in strike and dip, to the 
strata of mica slate, that they might be considered as integral portions 
of it; but on minute inspection the syenite is found to mould into the 
rough and saw-like edges of the strata of mica-slate ; and on tracing 
the veins as they gradually ascend the cliff, they are found to pursue 
undulating courses, neither parallel to each other nor to the lamine 
of the slate, in some places approaching within four feet, and in 
others being more than 20 feet apart. To the south of the fault 
which traverses the cliff about 150 yards from Torr Point, the veins 
reappear at a higher level than on the north of the line of dislocations ; 
and between the two previously noticed is a third and smaller one. 
Where first seen, this small vein is in contact with the upper surfaces 
of the lower vein, from which it gradually diverges and approaches 
the upper, but afterwards again descends towards the lower vein. 
