PETROLEUM AT CONTROLLER BAY. 
By G. 0. Martin. 
INTRODUCTION. 
LOCATION. 
The Controller Bay petroleum field is located on the north shore of 
the bay, which is a few miles east of the mouth of Copper River, in lon- 
gitude 144° to 144° 4CV west, latitude 60° 10' to 60° 15' north. The 
localities at which there are known indications of petroleum are con- 
fined to a belt about 25 miles long from east to west and from 4 to 8 
miles wide from north to south. (See fig. 1.) This belt is adjoined on 
the north in part b}^ the Bering River coal field. Its southern border 
Fig. 1.— Map of Controller Bay oil field, showing position of wells and 
is formed by Controller Bay and the Pacific Ocean and by the alluvial 
flats on the east shore of Controller Bay. The eastern and western 
terminations are formed by Bering Glacier and by the Copper River 
delta, respectively. 
OUTLINE OF THE GEOLOGY. 
The geology of the region and the occurrence of petroleum have 
already been described, a but more detailed geologic work and further 
developments have added much to the knowledge which was available 
a Petroleum fields of Alaska and the Bering River coal fields: Bull. U. S. Geol. Survey No. 225, 1904, pp. 
365-382. The. petroleum fields of the Paoific coast of Alaska, with an account of the Bering River coal 
deposits: Bull. U. S. Geol. Survey No. 250, 1905, 64 pp. Notes on the petroleum fields of Alaska: Bull. 
U. S. Geol. Survey No. 259, 1905, pp. 128-135. 
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