REVIEWS 205 



Supposed Oil-Bearing Areas of South Australia. By Arthur 

 Wade. Geol. Survey of South Australia, Bull. 4, 1915. Pp. 

 54, figs. 12, pis. 3. 



This bulletin gives the results of field search for oil-bearing horizons 

 in four areas along the seacoast. The rocks in these areas are largely 

 pre-Cambrian schists and quartzites either outcropping or concealed 

 by a thin covering of Tertiary sediments. On Kangaroo Island are 

 elastics assigned to the Cambrian, and glacial deposits doubtfully Permo- 

 carboniferous in age. 



The writer finds nothing in the lithology or structure of the strata 

 that can be interpreted as favorable to oil accumulation. He believes 

 that fragments of asphaltum found along the shore have come from beds 

 down-faulted beneath the sea by the great fractures along the southern 

 edge of the continent. 



W. B. W. 



Coal Fields of Kittitas County. By E. J. Saunders. Washington 

 Geol. Survey, Bull. 9, Pp. 204, figs. 52, pis. 38. 



Kittitas County has led all the counties of this state in the production 

 of coal for many years. The output is chiefly from a 19-foot vein in the 

 Roslyn formation of middle Eocene age. The coal is of good bituminous 

 grade and quite free from impurities. The general structural relations 

 of the beds are quite simple, but there are many striking local exceptions, 

 and some of these are illustrated by an excellent series of photographs 

 and diagrams. 



In certain portions of the county the Manastash formation of upper 

 Eocene age carries coal beds that are of no commercial importance at 

 present. 



W. B. W. 



Contributions to the Stratigraphy of Southwestern Colorado. By 

 Whitman Cross and Esper S. Larsen. Professional Paper, 

 U.S. Geol. Survey, No. 90-E, 1914. " Shorter Contributions 

 to General Geology, 1914." Pp. 39-50, pi. 1, figs. 2. 

 The overlap of the Gunnison formation ( = La Plata sandstone (Juras- 

 sic) below + McElmo formation (Jurassicf ?] (above) on pre-Cambrian 

 rocks "extends at least 50 miles farther up the valleys of the Gunnison 

 and Tomichi than was represented for the Jurassic beds on the Hayden 

 map The relations in the Piedra Valley suggest that the La 



