ADMINISTRATIVE REPORT. 15 
YAKUTAT-ALSEK REGION. 
R. S. Tarr, assisted by B. S. Butler, continued his work in the 
Yakutat Bay region. He had hoped to cross the Malaspina Glacier 
to Cape Yaktag, but the Assuring which had taken place in this ice 
field since his previous visit in 1905 made it utterly impossible to 
carry out this plan. Mr. Tarr's observations in this region showed 
that since 1905 an advance of some of the glaciers had taken place. 
This is, of course, exceptional for Alaskan glaciers, but nevertheless 
may have an important bearing on the location of railway routes 
where the fronts of ice sheets have to be traversed. 
Eliot Blackwelder, assisted by A. G. Maddren, made a geologic and 
topographic reconnaissance from Yakutat Bay southward to Alsek 
River. It was also planned to ascend that stream to the inter- 
national boundary, but a serious accident prevented the accomplish- 
ment of this purpose. A statement of Mr. Blackwelder' s results 
appears on p^ges 82-88 of this report. 
CONTROLLER BAY REGION. 
G. C. Martin completed the mapping of the accessible coal and oil 
fields of the Controller Bay district, begun in 1905. He was assisted 
by C. E. Weaver, and W. W. Atwood spent about a month in his 
party. Mr. Martin also carried topographic surveys over an area of 
about 200 square miles in this region. 
COOK INLET REGION. 
W. W. Atwood, assisted by C. E. Weaver, studied the stratig- 
raphy of the lignitic coal-bearing rocks" on both the east and west 
shores of Cook Inlet. This was part of the general plan to study 
the coal-bearing rocks of Alaska, already referred to. 
A party under the direction of T. G. Gerdine made a topographic 
and geologic reconnaissance survey of an area of about 7,200 square 
miles lying northeast of and adjacent to Cook Inlet. Mr. Gerdine, 
accompanied by Adolph Knopf as geologist, mapped the valley of 
Knik River, portions of lower Matanuska River, and the area about 
its headwaters from Chickaloon Creek northward. R. H. Sargent, 
topographer, accompanied by Sidney Paige, geologist, mapped the 
area as far as practicable between Susitna and Matanuska rivers as 
far north as Chickaloon Creek and Talkeetna River, with an addi- 
tional small area south of Knik River on the east side of Knik Arm. 
At the end of the season Messrs. Gerdine and Sargent completed a 
traverse of the shore line from Knik southward to the mouth of 
Kasilof River, and Messrs. Paige and Knopf visited the Cook Inlet 
placer fields. 
