42 NEW YORK STATE MUSEUM 



was little different from the figure reported for 191 2. The stone 

 quarries contributed products valued at $6,763,054. Iron ore, with 

 a gross output of 1,606,196 long tons, had a value of $3,870,841, 

 probably the record production for this industry, as was the total 

 returned for the salt industry which amounted to 10,819,521 barrels 

 valued at $2,856,664. The list of products included over twenty 

 other items. The recent progress of the industries, with notes of 

 new developments or discoveries in the field, are set forth briefly 

 in the report. 



Report on quarry materials. The first instalment of a detailed 

 investigation of the quarry materials of the State has been made 

 ready for publication so far as the text is concerned, but the illus- 

 trations as yet are not all in hand. The present report deals with 

 the crystalline rocks — the granites, gneisses, trap and marbles — 

 which are represented mainly in the older metamorphic regions ; 

 the sandstones and nonmetamorphic limestones of the regularly 

 stratified series still await study. 



Iron ores of the Highlands. A brief visit to the iron mines of 

 Orange and Putnam counties for the purpose of securing samples 

 of the ores and containing rocks for the Museum collections has 

 afforded opportunity to make some comparative observations in 

 regard to their geological features. These notes are quite general 

 in character, but they are based on the whole series of ore occur- 

 rences, inclusive of practically all that have been commercially 

 worked, and on that account may be of interest. The other recent 

 investigations have been of restricted compass, and in fact there 

 has been no attempt hitherto toward a broad geological study of the 

 ores. The recent papers by C. A. Stewart * and F. R. Koeberlein 2 

 upon some of the Putnam county mines embrace about all that has 

 been done in the field during the last twenty years. 



The geological formations of the Highlands of Orange and Put- 

 nam counties are part of the long Precambric belt that stretches 

 beyond the limits of New York across northern New Jersey and 

 western Connecticut and that in turn is but a part of the larger 

 Appalachian Precambric province. Throughout their extent from 

 southwest to northeast — along the axis of the belt — they undergo 

 110 essential changes of character and continue unbroken into the 

 adjoining states. They form knobs and ridges of greater or less 



'"The Magnetite Belts of Putnam County, X. Y." Tin- School of Mines 

 Quarterly, April [908. 



2 " The Brewster [ron-Bearing District of New York." Economic Geology, 

 I )ecember tooo. 



