

GLACIAL PHENOMENA AND SUPERFICIAL DEPOSITS. 225 
NNT SEMIN 8 Sig nal clas Vid wiginieid wip oe ae wie 5 oa wap pees 62°41 
eet MEN SC NOCKS 20 dw. ec ce ee ems henge ces 18°78 
3. Hard, green, and greenish-black rocks, hornblendic and epi- 
dotic, sometimes schistose.::. 5... ..5.5. 0556 ccc eee 7°38 
4. Dark greenish rock, evidently fragmental................ 2°68 
SS ee es eran Deere) ee 2°68 
6. Quartzite and hard jasper-like rock...............-.000-- 2°34 
7. Fragments of ferrugimous concretions ................. ..- 1:00 
ene OER tthe So bil ai biidinlll 9p pidias sod Geidinield pt clas 2 0°67 
ee EE aca clerk's ores on os nae auewa tenn 0°67 
10. Hard, coarse-grained, light-coloured quartzite ............ 0°67 
ee eee Pees eee 0°33 
ee NUMER OR Gs 8 no O ee ek acon whee we hahah we 0°33 
515. With regard to derivation, Nos. 2, 5, 8,9 and 11, are almost cer- 
tainly Laurentian. Nos. 3and 4are Huronian. No. 7, Cretaceous or Lignite 
Tertiary ; and No. 12 indeterminate. Nos. 6 and 10 are the first undoubted 
examples of a species of drift which further westward becomes increas- 
ingly prominent, and which I have called, for distinction, Quartzite drift. 
After having been observed in numerous places during the seasons of 1873 
and 1874, this drift was finally traced to the Rocky Mountains, as its pro- 
bable place of origin. It is of course possible, that some stray pebbles 
indistinguishable from the true Quartzite drift, but coming from the east 
or north-east may occur; or that some fragments from the Rocky Moun- 
tains may be indistinguishable from those of the Huronian, and included 
with them here; but I think, in the main, the conclusions as to origin 
may be relied on. From this point onward to the flanks of the mountains 
the Quartzite drift will be found to occur more abundantly in the travelled 
debris. 
516. Between the first and second crossings of the Souris River, and 
near the Antler Creeks, no sections of the prairie sub-soil are found. 
Boulders, however, are very numerous in some places, and are as usual 
mostly Laurentian, though there are some of limestone, and also a few of 
hard metamorphic blackish and greenish rocks like Huronian. Occasional 
boulders of pale pink sandstone, with darker coloured stratification planes, 
and also blocks of compact, rather coarse-grained, whitish sandstone, were 
also for the first time seen here. They belong to the Quartzite drift series 
and exactly resemble some rocks of the mountains near the forty-ninth 
parallel. 
517. Near the 192 mile point, the superficial drift was found to be 
composed as follows :— 
sy ee aOR io bt, Po ails olds cad herald Fide hie didie 5 d1°63 
2. Granitic and gneissic rocks, greyish and pinkish.......... 29°77 
3. Greyish, hard, altered rock, resembling quartzite.......... 6°54 
4. Quartzites and hard altered rocks..................... .. 4°00 
ee Pe ar 3°63 
