SOIVIE MINERALS FROM THE OLD TUNGSTEN MINE AT 

 LONG HILL IN TRUMBULL, CONNECTICUT. 



By Earl V. Shannon, 

 Assistmrt Curator, Department of Geology, United States National Museum. 



INTRODUCTION. 



The locality of Long Hill in Trumbull, Connecticut, is situated on 

 the Danbury branch of the New York, New Haven, & Hartford 

 Railroad, about 9 miles north of Bridgeport. The place where 

 tungsten mining has been carried on has been described by Hobbs,^ 

 whose report has been used freely in the preparation of the following 

 notes. The tungsten minerals, scheelite and wolframite, have been 

 known to occur here since an early date, and the locality became 

 especially renowned because of the excellent pseudomorphs of wol- 

 framite after scheelite which were occasionally found. Desultory 

 minings for materials for porcelain manufacture and for quartz for 

 use as a wood filler have been carried on, and a short time before 

 Hobbs's visit a corporation was formed to exploit the tungsten ores. 

 This venture seems to have been exceedingly ill-advised, and large 

 amounts of money were spent in opening great quarrylike mine pits, 

 from which many tons of rock were mined and milled to secure a 

 few tons of lean tungsten ore. An expensive mill was built, the 

 design of wliich was wholly impractical. This mill has since been 

 destroyed by fire. The persons in charge of the tungsten mine were 

 seemingly quite unacquainted with modern mniing practice, and, 

 despite the large amount of work done, little is known regarding the 

 extent or value of the tungsten deposits. 



The present writer visited the now deserted mine in October, 1919, 

 and collected a suite of representative specimens for the United States 

 National Museum. Although a careful search failed to discover any 

 tungsten ores, a number of interesting minerals were procured. 

 Some of these have been further investigated in the laboratory and 

 are described in detail below. 



iHobbs, WiUIam Herbert, The old tungsten mine In Trumbull. Conn., 22nd Ann., 

 Kept., U. S. Geol. Survey, pt. 2, pp. 13-22 .1902. 



PROCEEDINGS U, S. NATIONAL MUSEUM. VOL. 58-NO. 2348. 



