NONMETALLIFEROUS MINERALS, SOUTHEASTERN ALASKA. 75 
$150,000. This product sold in a rough state at $1 to $2 per cubic 
foot, and dressed for ornamental and monumental purposes at $2 to 
$.8 per cubic foot. Cut in slabs 1 inch to 2 inches thick and polished 
on one side the retail price varied from $0.50 to $1.50 per square foot. 
The eastern and foreign marbles sold for higher prices. 
DESCRIPTION OF LOCALITIES. 
PRINCE OF WALES ISLAND. 
Several deposits of marble have been located on Prince of Wales 
Island, and, as stated above, the largest of these is at Marble Creek, 
a few miles north of Shakan, on the north side of the island. Other 
deposits are at El Capitan, also near Shakan; on Marble Island, 
adjacent to the northwest coast of Prince of Wales Island, and at 
Baldwin and Dolomi, on the east coast of the island. 
At the Marble Creek locality are the properties of the Alaska Mar- 
ble Company, located upon a belt of Devonian limestone half a mile 
or more in width flanking the contact of an intrusive granite mass 
which forms the low mountain ridge to the east and which is evi- 
dently the direct cause of its alteration to marble. Small dikes of 
diabase, much altered and faulted, though rare, were observed inter- 
secting the marble beds, and apparently antedate the metamor- 
phism of the limestone and the intrusion of the granite. They are, 
however, not sufficiently numerous to affect the value or expense of 
quarrying the marble, and in the present opening only one dike is 
exposed. 
The extent of the deposit has been investigated by a number of 
drill holes and surface openings, and it is exposed at points over a 
length of 2 miles and a width of half a mile. Three varieties — pure 
white, blue veined with white background, and light blue, much of 
which has a mottled appearance — are found, the pure white rock 
being the most valuable. All of the marble is free from silica or 
flint beds, and though thin seams of pyrite were observed they do 
not occur in a quantity detrimental to the stone. Analysis of the 
rock shows 99.2 per cent calcium carbonate and 0.3 per cent mag- 
nesia. Though not equal to the best Italian grades, this marble is 
better than most American marbles and in the market will compete 
on at least equal terms with the Vermont, Georgia, and Tennessee 
products. 
The principal workings on this deposit are 100 feet above sea level 
on the south side of Marble Creek and 3,200 feet from deep water. 
A gravity railroad extends from the quarry to the end of the wharf, 
where loading facilities have been erected. Quarrying has extended 
below the more or less jointed surface rock, and solid blocks 6 by 6 
by 4 feet are being mined and shipped. With . increasing depth 
