THE.MINING AND QUARRY INDUSTRY I9QI2 — 83) 
etc., which in restricted areas become very abundant. Of valuable 
minerals, hematite and pyrite occur in commercial quantity, while 
galena, sphalerite, fluorite and barite are found in smaller bodies. 
The following analyses of the limestones are based on samples 
from the different marble quarries, but may be said to represent 
the general character of the rock when fairly free of admixture. 
Nos. 1, 2 and 3 are by R. W. Jones, made on samples collected by 
the writer in 1912. No. 1 is based on sample from the extra-dark 
quarry of the St Lawrence Marble Quarries; no. 2, quarry of 
Gouverneur Marble Co; no. 3, Rylestone quarry. No. 4 is an an- 
alysis of the marble in Northern New York quarry made some 
years ago but not hitherto published. No. 5 represents the dolomitic 
marble, formerly worked by the White Crystal Marble Co.; analysis 
made at Watertown arsenal. 
I 2 3 4 5 
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SO NE eee Mere ace naa unt cg ae ciate RRL i alal ))ahents -1.58 28 
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CAC On in ie Sia ate Cone rate a eae S700 psi BO On.88 2000: 
ASO dor Ue ene beg an aenh a ne ee banee Vis, (Gyey ipfeccl tril ue al Palla ee ac Rt a 
“CO ban ‘5 Fa desis Silat a serie etn Bn eithaed ote SU ene acd POR tee 7 a 42.56 47.38 
Sico.a 4'cib Sedh OAT Wt Sie eeR eel cee Ate ene eet 05 02 04 03 .06 
The typical Gouverneur marbles as illustrated in the first four 
analyses show a very uniform composition in respect to the lime 
and magnesia. On the other hand, the white marble shows a much 
larger amount of magnesia which reaches the proportions of a 
dolomite. 
The Gouverneur marble all comes from a small area southwest of 
that town; the quarries, with one or two exceptions, lie along a 
narrow belt which extends for a little over a mile in a northeast 
and southwest direction. The greater number of openings are on 
the eastern section. The quarries lie on the outcrop of the marble 
“vein” or beds which dip northwest at an angle ranging from 15° 
to 30° on the eastern end to 89° or go° on the western end. Besides 
the dip, there is a well-marked pitch that seems to be mainly south- 
west at an angle of 20° or 25°. The structure resembles that of 
an overturned pitching fold which has undergone deep. erosion. 
In color and texture, the marble shows variety, though the differ- 
ences are not specially prominent between the several merchantable 
grades of stone. It is mottled white and grayish blue, or light and 
