Review of Recent Geoloyical Literature. 389 
rail and lake shipments. The former will generally be somewhat in ex- 
cess of the latter for any given year, although they will not vary much 
over a period of years. h. v. w. 
Report on the Country in the Vicinity of Red Lake and part of the 
Basin of Berens River, Keeioatin. By D. B. Dowling. (Geol. Sur- 
vey of Canada, Ann. Rept., n. s., vol. 7, pp. 1F-54F, one map, 18S6.) 
This paper presents a report of exi)lorations in an area of 6, .300 square 
miles lying east of lake Winnipeg and north of Rainy lake; more accu- 
rately it is situated between latitude 50 degrees 30 minutes and 51 de- 
grees 50 minutes N., and longitude 92 degrees 40 minutes and 94 de- 
greeite 15 minutes W. of Greenwich. The geological formations, except 
the drift, are all pre-Cambrian in age and are mapped as Laurentian 
andHuronian. Under the former term are included granites, gneisses 
and some mica schists. The exact relation of the Laurentian to the 
Huronian is not fully stated, although one might infer that the former 
was intrusive into the latter: at any rate several areas of granite 
mapped as Laurentian are clearly intrusive into the Huronian. The 
Huronian consists of schists of various kinds, limestones, altered basic 
and acid igneous rocks, agglomerates and conglomerates. 
In general it may be said that the rocks and their relations so far as 
known are similar to those of the closely adjoining Lake of the Woods 
and Rainy Lake regions, which were described a few years ago by Dr. 
A. C. Lawson, and it seems most probable that the area here described 
by Mr. Dowling is the same in age and general relationships as the re- 
gion reported on by Dr. Lawson. Some of the rocks here classed as 
Laurentian (mica schists) would probably have been put in the Cout- 
chiching by Dr. Lawson, but Mr. Dowling states that other strata 
most resemljling the typical Coutchiching are only highly altered 
parts of the Huronian in contact with the Laurentian eruptives. The 
author questions the propriety of extending the name Keewatin to the 
rocks he describes as Huronian, although this would seem to be the 
most natural thing to do. 
The presence of a conglomerate holding jasper pebbles is of interest 
as indicating a possible division of the rocks here mapped as Huronian 
into two vinconformable series, a division which has already been 
worked out in strata of the same general age on the south side of lake 
Superior V)y Prof. Van Hise and which also exists in similar rocks in 
Minnesota north of lake Superior. u. s. G. 
Tlie Physical Features of Missouri. By Cuktis Fletcher Makbut. 
(Reports of the Missouri Geological Survey, vol. x, pp. 11-109, with 
eleven plates, and nineteen figures in the text; 180G. ) This a very in- 
teresting and satisfactory description of the contour of Missouri, with 
discussion of the epeirogenic movements and cycles of subaerial erosion 
to which the form of the surface is due. The general upland, in its two 
parts nami^d the Prairie region and the Ozark regi<m, is a peneplain or 
graded surface cutting across the bevelled edges of the strata. Its alti- 
tude is mainly between 800 and 1,500 feet above the sea. The uplift 
