Geoloijy of Mattcum and Ottawa Valleys. — Taylor. 109 
vious paper.* They ai-e both strongly and clearly developed. 
Another, called the Thibeault beach, on the hill about two 
and half miles north of North Bay was also described. The 
part seen there was only a short fragment and on revisiting 
the place last season it was found to be a weak feature and 
not well developed. The lands along the slope to the west- 
ward are better cleared now and although they present a 
rather iri'egular surface of drift and are in a very exposed 
place the beach was barely distinguishable upon them. From 
this I am rather inclined to doubt the propriety of classing 
this beach as one of the greater beaches to be used in corre- 
lations with other more strongly developed parts elsewhere. 
It is too weak and poorly defined to be safely used for that 
purpose. 
C4oing north from Thibeault's the road is mostly through 
the forest and no conspicuous evidence of submergence was 
noticed. Half a mile north of Thibeault's a short ridge in the 
woods resembles a spit at about 1,050 feet; but its origin is 
not certain. About four and a half miles from town Chippewa 
creek was crossed at about 990 feet. The high fresh cut bank 
showed sand mixed with white silt, but showed scarcely any 
evidences of stratification. Above this is a stretch of slightly 
rolling ground with sandy soil at about 1,100 feet. This sub- 
stantially corresponds with the level of the McEwen beach at 
about 1,095 feet (corrected). f This tract gradually" rises to 
an ill-defined low blutf at about 1,130 feet and is probably 
the Nelson beach. From this rise a level plain extends about 
a mile through a maple forest to the house of Mr. McKenzie 
on the west side of the road six miles from North Bay. The 
altitude at McKenzie's and for nearly a mile south is about 
*See first paper mentioned in preceding footnote. The name "Neleou 
beach" was never intended to have the wide api)Hcati()n given it in re- 
cent papers by Mr. Warren Upham, but was used merely as a locahty- 
nanie for convenience. Being a well determined part of the "highest 
beach" in a situation where it cannot l)e attributed to small or locally 
restricted waters, it is plain that the Nelson Ijeach is in reality merely 
a part of the Algonquin beach. 
tin the previous papers the altitude of the station at North Bay was 
supposed to be 658 feet above mean tide. The C. P. R. profile, obtained 
afterwards through the courtesy of the Geological Survey of Canada, 
makes it 662 feet. This correction, l)y adding four feet, should be made 
for all the points in the earlier paper that were measured from North 
Bay station. 
