182 Hie American Geologist. st-ptember, i892 
as determined by fossils, from Carboniferous to Cambrian. Above the 
Kootanie beds, whose identilication here by their flora was first an- 
nounced by Newberry live years ago, the next recognizable formation is 
the Ft. Benton, the intervening Dakota formation not being apparently 
represented The Kootanie Mora has many species in common with the 
Potomac formation. 
A smaller coal field, allied by its fossil plants to the Ft. Union beds 
overlying the true Laramie, is mined at Red Lodge, situated near the 
south line of Montana on the Rocky fork, tributary to Clarke's fork and 
the Yellowstone. In this vicinity nineteen coal seams have been ex- 
amined; and six of them, which have been worked near Red Lodge, 
vary in thickness from 5 to 13 feet. The strata dip about 15° southward, 
terminating at the fault line that runs along the northern base of the 
Beartooth range which, though unexplored, is known to be glacier- 
crowned and is believed to include the highest peaks in Montana. 
Summary Report of the (jeologicul^arwy of C<ni((ihi for the year 1S91 
Alfred R. C. Selwyn, Director. Department of the interior, Ottawa. 
60 pages; price 5 cents. Among the many fields of work by this survey, 
all of which are here described, wiih concise statements of their princi- 
pal results, the observations of most economic importance relate to a 
very rich coal field of tae Kootanie formation in the southeast edge of 
British Columbia, about 200 miles northwest from Great Falls, Montana. 
Between the eastern summit of the Crow's Nest pass, which cros^ses the 
most eastern ranges of the Rocky Mountain belt, and the valley of the 
Elk river at the mouth of Coal creek, which flows westward from this 
pass, Dr. Selwyn estimates an area of not less than 144 square miles, 
containing about 50,000,000 tons of coal in each square mile, of which 
probably half on an average is available for mining. Twenty coal seams 
were examined in the Crow's Nest pass and westward, showing a total 
thickness of 132 feet of coal. Three of these seams are respectively 30, 
20, and 15 feet thick. On the eastern side of the Elk river about seven 
miles below Coal creek, the series has twelve coal seams, three of which 
are each about 30 feet thick, with an aggregate of 148 feet. 
Essayo Edadtshio del Estudo de Jalisco, por Mariano Barceno, Direc- 
tor del Observatorio Meteorologico Central. (Annales del Ministerode 
Fomento de la Republica de Mexico, Mexico, 1801. 8vo, pp. 729 ) 
Few, if any of the United States, possess such an excellent ofiicial 
and comprehensive description of their resources as professor Barceno 
has presented in this admirable monographon Jalisco, one of the western 
central states of the republic. The neatly printed volume is divided 
into nine parts, treating of the geography, orography, geology, hydro- 
graphy, climatology, flora, agricultur-", horticulture, and the acclimatiza- 
tion of plants introduced into the state. 
Paleozoic Formations in SoiUheastern Minnesota. By C. W. Hall and F. 
W. Sakdesox. Bulletin, G. S. A., Vol. iir, pp. 331-368, with three plates, 
and seven figures in the text; June 23, 1892. The miximum total thick- 
ness of the Paleozoic strata in this district is about 2,400 feet, their 
