MANITOBA AND THE NORTHWEST. 91 
(on the supposition that it is uniform) not more than 115 feet to the mile. The Archean 
surface at Rosenfeld is 265 feet below the present sea-level, that in the southern part of the 
Lake of the Woods is 1,060 feet above the same datum. A further remarkable fact in this 
connection is afforded by the boring conducted at Rat Creek in 1874, by the Geological 
Survey, details of which will be found in the Report for 1874-75 (p. 3). This place is about 
seventy miles north-west of Rosenfeld. Here, after penetrating the superficial deposits, 
the surface of a buff Silurian or Devonian limestone was reached at about 103 feet below 
the prairie-level. This limestone proved to be only forty-two feet in thickness, and 
beneath it a fine-grained grey crystalline rock (apparently a quartzite) was bored into 
for a depth of about eighty feet. This rock evidently belongs to the Archean, and is 
either Laurentian or Huronian. The Archæan surface at this place must be nearly 700 
feet above the present sea-level. The relative elevation of the Archæan surface at these 
three points (Rosenfeld, Lake of the Woods and Rat Creek) would indicate a direction 
of about W.N.W. by E.S.E., as that of a level line drawn upon it in this part of its 
extent. 
II.—BorING AT SOLSGIRTH. 
This is a station on the Manitoba and Northwestern Railway, in the north half of 
section 30, township 17, range 25, west of 1st principal meridian, elevation 1,757 feet. I am 
indebted for particulars concerning it to Mr. Reginald Baker, General Superintendant of 
the railway. The information was obtained partly from an excavated well and partly 
from a boring. The notes were accompanied by a suite of specimens, which has been 
carefully examined. The section is as follows :— 
Feer 
1H iDGENouccomdbesttosonivudoo eos ouboodeTentsocorenc boue co vauo0c 2 
2ÉEardibiuerclaviandieraveleecre--cp-cs--rpecersc-esee cer 42 
SMÉardibIUeClay an distOneS PER eee -tstaton cleiwlsiitsieielelsiens oieicicis icicles 10 
4. Hard yellow “ hard pan..." uen. see seirieesie ocsiss> sevice 12 
EMBoftembluBhiClA Eee recense cet 16 
6. iS sf TN phonodcoot soupe tocDe db sacle Hood acercte lel oiersvorts 74 
(ep AyOL On Sarid. [awit WA TET tstejatelelerieratertetstsbalelots\oie els\/eloiere ole clenelsteleretele cists — 
re GENT Ayautlel sraVelsisGoho. bh opobo, WapsoowoDed donbeD peda ca todour bace a + 136 
9: Grey, clay: (SHAlC?)\scwielee che... SoudeD BHbODO Gatinds démon oo 68 
MODAT See asin sleheiat aster oletel, stelsleletel eleiaiensiierstaietcveisiaete 360 
The specimens received show the material to have been a hard grey boulder-clay in 
which small rounded fragments of fine grey Cretaceous shale, and of the white limestones 
of the Manitoba lake-region, are abundant. No.9, of which one small specimen only was 
received, appears to be a grey, gritty, Cretaceous shale, resembling some parts of the Pierre 
shales, but it is not absolutely certain that it may not represent a laminated clay belong- 
ing to the drift. Excluding this lowest layer, however, the thickness of the glacial 
deposits is here rather remarkable, being no less than 292 feet. 
From 76 feet below the surface, in the boulder-clay, a broken fragment, 14 inches in 
diameter, of pale-grey, fine-grained, Cretaceous argillite, was brought up. Fragments of 
wood, for the most part soft and decayed, but not otherwise much changed, except from 
