254 DESCRIPTIVE CATALOGUE 
228. Dolerite—colour, dark greenish gray; minutely crystalline. Traverses 
No. 227. 
229. Metamorphosed shales—very calcareous ; colour, gray ; thinly laminated ; 
light specific gravity ; granular ; contorted. When highly metamorphosed, present 
a quartzose appearance. 
230. Greenstone. 
251. Metamorphosed red sandstone—from fragments enclosed in No. 230. 
232, 233, 234. Metamorphosed siliceous and siliceo-argillaceous shales—of every 
grade, from the “ Palisade” rock, No. 251, to a light reddish blue and gray rock, 
little altered. Some are heavy, compact, and fine-grained; others are light and 
granular; and one variety bears great resemblance to roestone. Some of the beds 
contain very perfect crystals of Labrador felspar. 
235. Basaltic rock—dark-coloured, almost black. A few very minute crystalline 
points to be seen. 
236. Red sandstone—fine-grained ; fine lines of deposition. 
237. Red sandstone—pebbly ; the pebbles from the size of bird-shot to half an 
inch in diameter, all water-worn, rounded, and smooth. 
238. Basaltic rock—fine-grained ; homogeneous; smooth fracture; colour, dark 
purplish gray. 
239. Coarse grains of felspar, the size of peas, with a few crystals of larger di- 
mensions, cemented by a paste of dirty reddish-white felspar. Colour, greenish 
gray. Shows lines of stratification. Appears to have been derived from the disin- 
tegration of Amphodelite rock, No. 148. 
240. A variety of greenstone—composed, principally, of hornblende and felspar ; 
coarsely crystalline, with a few crystals of white felspar disseminated through it, 
which gives it a porphyritic appearance. 
241. Greenstone—minutely crystalline. 
242. Same as No. 195. Siliceous shale; colour, light purplish gray; some thin 
white bands of sandy material; a few white spots, which penetrate the rock per- 
pendicularly ; very fine-grained ; fracture smooth, the perpendicular one even, the 
horizontal one, in the thicker layers, conchoidal. 
243. Same as No. 242—with thin partings of quartz-sand. 
244. Metamorphosed argillo-siliceous shale—colour, red, like a half-burnt brick ; 
the lamination discoverable, but nearly obliterated. Tolerably large grains of quartz 
disseminated through it. Not so highly metamorphosed as the rock underlying the 
“Great Palisades,” but belongs to the same beds. 
245, 246. Coarse siliceous shale—becomes coarsely granular, and then pebbly, 
and finally merges into a coarse conglomerate, with many large pebbles of Nos. 242 
and 243, from half an inch to three inches in diameter. The shaly, pebbly portion 
is of a purple colour, thinly laminated, and full of zeolites between the lamine and 
in the joints; and has small veins or strings of laumonite ramifying through it in 
all directions. It bears a great resemblance to the shale-beds intercalated with 
the upper conglomerate of St. Louis River. 
247. Dolerite—colour, dark greenish gray; disposed to be prismatic at some 
points. | 
