THE TIN DEPOSITS OF THE YORK REGION, ALASKA. 
By Arthur J. Collier. 
INTRODUCTION. 
The known occurrences of tin in Alaska are close to the westernmost 
point of the American continent, in the York region of Seward Penin- 
sula, the land mass which projects from the west coast of Alaska to 
within 60 miles of the coast of Asia. The peninsula as a whole has 
become famous in recent years on account of its gold placers, and every 
summer it is the objective point of a fleet of vessels loaded with pros- 
pectors following the ice pack in its northward retreat. The city of 
Nome, its most important mining camp, is the metropolis of Alaska. 
North of Seward Peninsula the Arctic Ocean stretches away toward 
the pole, while on the south Bering Sea, icebound for half the year, 
extends for 700 miles to the open water of the Pacific Ocean. 
2000 TO 2500 FT. 
CAPE YOR 
'Fig. 1.— Sketch of the coast from Cape York to Cape Prince of Wales. 
Geographic position of the York region. — The York region, which 
derives its name from Cape York, an ill-defined promontory on Bering 
Sea, about 100 miles northwest of Nome, comprises that portion of the 
peninsula west of the entrance to Port Clarence, thus including Cape 
Prince of Wales, the westernmost point of the American continent. 
Its general geographic position is shown in the outline map, PI. I. 
Reference to the topographic map, PI. II, will show that the region 
has the general form of an isosceles triangle, with its apex at Cape 
Prince of Wales and its two sides formed by the shore lines of the 
Arctic Ocean and of Bering Sea. The southern coast line is, in the 
main, inhospitable and unbroken by inlets or harbors. The land usually 
presents abrupt escarpments rising from narrow rocky beaches and 
giving it a forbidding character, well shown by the sketch reproduced 
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