LIST OF. ILLUSTRATIONS 
xi 
*'IG. 
PAGE 
235. Plan of basalt- veins with selvages of black basalt-glass, east side of Beinn Tighe, Isle 
of Eigg 126 
236. Arrangement of lines of amygdales in a dyke, Strathmore, Skye . . • 13° 
237. Systems of joints in the dykes 132 
238. Section of cylindrical vein or dyke, cutting the bedded lavas, east side of Fuglo, 
Faroe Islands 133 
239. Joint-structures in the central vitreous portion of the Eskdale Dyke (B. N. 
Peach) ........... 133 
240. Microscopic structure of the vitreous part of the Eskdale Dyke . . ■ 136 
241. Section along the line of the Cleveland Dyke at Cliff Ridge, Guisbrougli (G. Barrow), 
scale, 12 inches to 1 mile . . . . . • • • 147 
242. Section along the course of the Cleveland Dyke, at the head of Lonsdale, York- 
shire (G. Barrow, in the Memoirs of the. Geol. Survey, Geology of Cleveland, 
P- 61) . . . . . . . . . . .148 
243. Section across the extreme upper limit of Cleveland Dyke, on the scale of 20 feet to 
one inch (Mr. G. Barrow) ........ 149 
244. Upper limit of Cleveland Dyke in quarry near Cockfield (after Mr. Teall) . . 149 
245. Section along the course of the Cleveland Dyke across the Cross Fell escarpment 
(scale of one inch to one mile) ........ 150 
246. Branching portion of the great dyke near Hawick (length about one mile) . . 153 
247. Branching dyke at foot of Glen Artney (length about four miles) . . .153 
248. Basic veins traversing Secondary limestone and sandstone on the. coast cliffs, Ardna- 
murchan 
249. Section showing the connection of a Dyke with an Intrusive Sheet, Point of Suisnish, 
Skye ....••••■•• 
250. Section to show the connection of a Dyke with an Intrusive Sheet, Stirlingshire Coal- 
field 
251. Intersection of dykes in bedded basalt, Calliacli Point, Mull .... 
252. Basalt veins traversing bedded dolerites, Kildonan, Eigg .... 
253. Ground-plan of intersecting dykes in Lias limestone, Shore, ILarrabol, East of Broad- 
ford, Skye 
254. Compound dyke, Market Stance, Broadford, Skye . • • • 
255. Section of coal rendered columnar by intrusive basalt, shore, Saltcoats, Ayrshire 
256. Dolerite dyke with marginal bands of “white trap,” in black shale, Lower Lias, 
Pabba 
155 
156 
157 
158 
159 
159 
162 
164 
166 
257. 
258. 
259. 
260 . 
261 . 
262 . 
263. 
264. 
265. 
266. 
Map of the chief dykes between Lochs Ridden and Striven (C. T. Clough, Geological 
Survey, Sheet 29) . . • • • ' 
Basalt-veins traversing granopliyre, St. Hilda 
Section of scoriaceous and prismatic basalt, Camas Tharbernish, north shore of Canna 
Island 
Banded amygdaloidal basalt showing layers of elongated and steeply inclined 
vesicles, Macleod’s Maidens, Skye 
Termination of basalt-beds, Carsaig, Mull 
Breccia and blocks of mica-schist, quartzite, etc., lying between bedded basalts, s e 
of Mull 
Section of Knocklayd, an outlier of the Antrim basalt-plateau lying on Chalk 
Diagram-Section of the Antrim Plateau . • ■ ' ' 
View of Basalt escarpment, Giant’s Causeway, with the Amphitheatre and Chimneys. 
(From a photograph by Mr. R. Welch) 
Basalt-capping on the top of Ben Iadain, Morven 
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191 
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197 
202 
203 
,207 
209 
