36 
FOURTEENTH REPORT. 
Mr. R. A. Smith was appointed Assistant Geologist to assume duties 
in October, 1911. 
FIELD WORK, 1911-1912. 
The field work on the upmapped Huronian area of the Northern 
Peninsula which began in the Iron River district in 1009, and was 
continued west of this district throughout the field seasons of 1910 
and 1911. will be continued during- the season of 1912. This work, 
though only partly completed, has already led to very important eco- 
nomic and scientific results. This work, together with that of the Wis- 
consin Geological Survey in the Florence district has corrected, and in 
fact largely revolutionized current ideas of the structure of the pre-Cam- 
brian rocks south of the Menominee and Gogebic iron districts. 
