DO-K-LING. INTRODUCTION 9 F 
fifty feet high, capping beds of probably Animikie age*. These are 
dark slates irupregnated with iron ore and interbaudcd with beds of 
jaspilyte. Some of the beds contain a high percentage of magnetite. 
On the east shore a section of about ninety feet of these jasper and 
iroii-beariiig slates is exposed above the lake, but on the west .side they 
have been brought down to below the water level by ;i series of north 
and south faults, and the exposure-s there are of the trap alone. These 
rocks form an east-and-we.st ridge reaching to the upper lakes on the 
Washagami, and ea.siward to a large lake on a branch of the Trout 
river which, as before stated, drains Sutton Mill lakes and runs to the 
north. The slates and jaspilyte or jasper-sandstone bed.s form a long 
anticline, whose axis runs east -and- west, and the majority of the beds 
ex})osed belong to the northern slope of the anticline. This ridge is 
terminated on the lake by a senes of north and-south faults with 
downthrow to the west of unknown amount. The overflow of trap 
appears Ut have iioen at a later dale, a.s there seems to be some uncon- 
formity at the base of the trap, the Ilow having filled all the ineipia- 
litie.s in the underlying surface. The cliff at the west side of the 
narrows is of trap, one hundml and fifty feet high, with none of the 
jaspilyte.s showing beneath it. On the east side, however, ninety feet 
of these beds are exposed, with a varying thicknes.s of trap above 
them. 
The shore of James b.ay is low and sliallow, and a short de.scrij)tion 
as given in the summary report is here addl'd. The delta at the 
mouth of (he .Mouse river is divided into three channels which enter 
James hay. 'I'lie northern one runs from north of Middleboro island 
to the north-west of Ship Sands, but it i.s nearly dry at low water and 
is al.so iinpcdetl liy large boiilder.s, so that, it is not u.seii e.xcept by 
canoes and small boats. 'I’he .southern channel i.s also reported to be 
shallow. Tim central cliaimel, which runs along the south edge of the 
Ship Sands, .slioals to seven feet at low tide, and vessels jiass at high 
water after having been lightened to draw about twelve feet. 
Northward from the outer bar to North point, the water is very 
slioal, hut it deepens slightly to Nomamsland. The low-thic flats are 
not very wide, but bar.s project from many of the points for long dis- 
tances, as at Long llidge and (.tockispenny points. At Halfway point, 
limestone fragments are pushed up along the .shore from rock appa- 
rently in ititu below tide, l.ong Ridge point i.s built up mostly of 
* In my written inctriictiMiH frinn l>r. Hell he predicted th;it the.se* rock.s would 
probably prove, to be of tins age and not Laurentian, as bad lieen previously supjHweci. 
See Siminiarv Heitort, (tcol. Survey for H.Hil, }i. IKI. 
Iron bearing 
slates. 
Description of 
shore of 
.lames hay. 
