154 PROCEEDINGS OF THE GEOLOGICAL society. _—[{ Dec. 22, 
3. Bole—an indurated red ferruginous ochre, less compact 
than that of Slievananee, ...............eeceeeees Thickness 2 ft. 
passing into and alternating with 
ANIM CLlOWROCH TO NL CR tera. Une ar senan aan ee Thickness 3 ft. 
which graduates into 
5. Blue Lithomarge. Base not seen, but thickness proved to 29 ft. 6 in. 
The several masses in the above section, as, indeed, in others, ex- 
hibit a pseudo-stratified arrangement, here dipping at an angle of 
34°, E. 50° N. magnetic. The whole mass has been bored to a 
depth of 45 feet, which gives a minimum thickness for the iron ore, 
ochres, and lithomarge of 371 feet. 
3. Enumeration of localities.— Passing east from Slievananee, the 
iron-beds are worked from the face of the basaltic escarpment over- 
hanging Milltown, Red Bay, at the entrance to Glenariff Glen ; the 
beds dip west about 5°, and are about 200 feet above the upper 
limit of the White Limestone. Further to the east, the iron-band 
has been traced to near Garron Point. 
Two miles to the west of Carnlough, the ferruginous series is 
seen at a height of 600 feet above the sea-level, dipping at an angle 
of about 40° east (magnetic). The matrix of the pisolitic ore, 22 
inches in thickness, is of a bright vermilion-red colour, becoming 
browner as it passesdownward; it then passes into a friable yellowish 
ochre, four and a half feet thick, which, in its turn, graduates into 
a blue lithomarge, 35 feet thick. Overlying the pisolitic ore is a 
semiprismatic basalt, the columns of which are perpendicular, and 
consequently include, with the underlying strata, an angle of 50°. 
Other outcrops are worked at Ballyvaddy and Tully, near Glenarm, 
andat Anteville, Kilwaughter (3 mines), and Shane’s Hill (2 mines), 
near Larne. 
4. Deductions from the several sections—We deduce from the 
foregoing sections the gradual passage of the underlying basalt 
into a variegated lithomarge of an average thickness of 30 feet, 
graduating insensibly into the overlying red or yellow ochre or 
bole, 5 to 6 feet thick, which passes into, and is surmounted by, a 
pisolitic iron-ore of an average thickness of two feet. ‘The spheroids 
of iron-ore increase in number and size towards the upper part, 
and not unfrequently constitute that portion of the bed. The line 
of junction between the iron-band and the overlying basalt (which 
is usually more or less columnar), is well defined, and in a few in- 
stances exhibits decided unconformability. 
Though a band of iron-ore can be traced with some certainty over 
a considerable area, yet it is by no means proved that the ore in the 
various sections, many of which are several miles distant from each 
other, represents portions of one sheet extending uniformly through- 
out the basalt. To determine this point will require a laborious 
survey of the country, chiefly because of the numerous faults—a 
task too gigantic for us to perform. Still we are justified, from the 
identity of the phenomena in the many sections examined, in 
assuming that in the midst of the basaltic rocks there is a continuous 
band of iron-ore. 
Only in two instances have we been able to refer the iron-band 
