250 B. N. A. BOUNDARY COMMISSION. 
might be presupposed from their relative positions. It is likely that 
the calcareous matter is much of it derived from the chalky beds 
of No. 3. 
577. In sections on the Roseau River, the edge of the alluvial 
deposit is found resting on the coarser sands and gravels of the drift; 
and in the neighbourhood of Lower Fort Garry and elsewhere, accord- 
ing to Prof. Hind’s sections, it rests directly on boulder-clay.* In the 
vicinity of the town of Winnipeg, boring for water has already been 
somewhat extensively carried out, for information concerning which I 
have again to thank Mr. A. L. Russell. Water has generally been 
obtained at from forty-five to sixty-five feet, the average being about 
fifty. The general section met with is thus stated: 
Black loamy 5 2ii.ds ise ener d OS 3 CelOk ey heehee le wee about 4 feet 
Yellow mud and “sand » oi .'s 0:2 oispim wes helene pan oa 
Bhie fand amd qikali ws. 2). <5 sss nainehs ae ek ae ee ow, Se 
Limestone concrete, resembling the bed of a river, and 
CAYTYING WADET 5... .cniccen mals ae ake ek ee eee Ae 
The most instructive Section of the deposits of the valley, is, how- 
ever, that obtained in a deep boring at Fargo, Dakota, about 150 miles 
south of the Line. The record is as follows, as given by Professor 
Thomas :— f 

Boil hs. Jane. noe Cee URS eee ER ite c eee eee een 3 feet. 
White and yellow (or drab) clay ...%..s -nssncplen manne 50. . 
Wine Gark Cay’... es sas 'nne eens oe bee vee ae eee eee an). 
Small stone; and gravel.) . .)skitiwis « det’. bull pica abe 10 : 
Hard clay (‘hard pan’) mixed with gravel and 
boulders Ee ork OO OES, ches he eas aie eee ee oe 
Soft, dark-blue; shale... . 5 dies. «su60.3.§ sytem gee ae eeate kn ani 
Cosrse SANU-TOCEH .. ...5 5 .0%5 0s vas halen bck se Ree Bis 7 
Soapstone, 3.20'554 2. I, OS Ee ee eek ee eye 
262 
The two sections may be thus paralleled :— 
Winnipeg. Fargo. 
BOOR oso tana bos Ge wha is Sain ohe Wie 4 3 feet 
Upper lacustrine deposit.............+5 6 hs 
Lower lacustrine deposit............+0. 30 ee 
Modified arift's3.. 5 Oaks RR unknown 10 Mi 
Bondder LUGS coe. bi 'es' bende ti kee ee S 116 
CreGaceOUn TORRE... ois esses cole utd Re a 43. = 
The lower parts of the lacustrine deposit may have been formed at a 
time when the sheet of water was not limited by the Red River Valley, 
and perhaps even before the sea water finally left the area. 
* Papers relative to Exploration between Lake Superior and Red River, 
t U.S. Geol, Surv. Territ., 1872, p. 301, 

7 
