14 ALASKAN MINERAL RESOURCES IN 1906. 
In June, 1906, the writer joined Mr. Kindle at Eagle and together 
they made a careful study of the geology along the upper Yukon. 
The main purpose of this work was to gather data which would serve 
to elucidate the stratigraphic problems, but incidentally some facts 
were obtained bearing *on the occurrence of placer gold and of coal. 
From Circle the writer went overland to Fairbanks, making an exami- 
nation on the way of the Birch Creek placer district. A few days 
were then spent in the Fairbanks district. At the invitation of Maj. 
W. P. Richardson, the writer joined the party of J. L. McPherson, 
engineer of the Alaska road commission, and carried a geologic recon- 
naissance westward from Fairbanks to the rapids on the Yukon, 
including a brief visit to the Rampart district. The month of Sep- 
tember was spent in Seward Peninsula, with the Moffit and Hoyt 
parties, and in making a study of the Kougarok placer district. 
After returning to the office the writer was occupied in preparing a 
statistical report on the gold and silver production of Alaska in 1905, 
which has been published in the Mineral Resources of the United 
States, 1905. 
To W. W. Atwood was assigned the task of studying the stratig- 
raphy of the Cretaceous and Tertiary coal-bearing rocks in the Terri- 
tory, with the purpose of establishing correlation and obtaining 
information on the relative commercial value of the different fields. 
The details of this investigation are referred to in another place. 
SOUTHEASTERN ALASKA. 
The close of the last season witnessed the completion of the pre- 
liminary geologic mapping in southeastern Alaska as far northwest 
as Lituya Bay. There still remains, however, the survey of the 
Chilkat basin, the inland parts of the larger islands, and the more 
inaccessible portions of the high ranges. The work of last year 
embraced an area of about 3,000 or 4,000 square miles, extending 
northwestward from Lynn Canal to Lituya Bay and including a part 
of Chichagof Island. This survey was carried on by F. E. and C. W. 
Wright, assisted by R. W. Pumpelly. Though it was principally 
geologic some topographic reconnaissance surveys were made and 
much information was obtained on the retreat of the glaciers in the 
Glacier Bay region. At the close of the season C. W. Wright visited 
the Juneau and Ketchikan districts to collect data on the mining 
progress. 
The urgent demand for detailed surveys of the more important 
mining districts in southeastern Alaska has been met so far as the 
funds available would permit. In 1906 R. B. Oliver made a survey, 
on a scale of a mile to the inch, of the more important parts of the 
Berners Bay district, embracing an area of about 40 square miles. 
