DISTRIBUTION OF ALLANITE 469 



on page 474. Other occurrences of allanite^^ are at the Bolton quarry 

 with petalite, etcetera, and in Athol on the road to Westminster in gneiss. 



Prof. A. C. Lane, of Tufts College, who kindly sent the writer notes 

 on the occurrence of allanite in Essex County, accompanied by specimens, 

 states that the mineral is found in the quarries of the Winchester Eock 

 and Brick Company on Blueberry Mountain and the Fessenden Eoad 

 quarry in Arlington. The allanite occurs in "granodiorite aplites" or 

 pegmatites associated with feldspar chiefly plagioclase, chlorite, both 

 massive and thin folia, replacing biotite, epidote, pyrite, and magnetite. 

 The largest lump of allanite observed was 2 to 3 centimeters in diameter. 

 Lane adds that the allanite acts as a center of crystallization for the feld- 

 spar and is not infrequently surrounded by a rusty zone of the altered 

 mineral. 



New Hainpsldre and Vermont. — Dale-"* reports allanite as a subordinate 

 original accessory constituent in the granites of Milford, Kilkenny, Con- 

 way, and Eedstone, New Hampshire, and of Caledonia, Orange, Orleans, 

 Washington, and Windsor counties, Vermont. The pegmatite of Milford, 

 New Hampshire, contains accessory allanite associated with magnetite 

 and zircon.-^ 



Connecticut and Rhode Island. — Allanite as a minor primary accessor v 

 mineral in the granites of Connecticut and Ehode Iskmd, especially those 

 of the Westerly and Niantic quarries, has been reported by many ob- 

 servers.-^ According to Professors Eice and Gregory,^^ the occurrence of 

 small spots of allanite in the Westerly quarries has given the rock the 

 local name of "bed bug granite." Dana-^ lists allanite at Allen's vein at 

 the gneiss quarries in Haddam. 



MIDDLE ATLANTIC STATES 



General observations. — The chief occurrence of allanite in these States 

 is in pegmatite bodies, which carry in several instances a long and inter- 

 esting list of associated rarer minerals. At some of the localities the 

 crystalline masses of allanite exhibit the usual reddish brown alteration 

 product from weathering. 



23 E. S. Dana: A System of Mineralogy, moo, p. 525. 



2*T. N. Dale: Bull. 354, U. S. Geol. Siu-vey, 1908 ; Ibid., 404, 1909; ibid., 430, 1910, 

 pp. 346-372. 



^' T. N. Dale : Bull. 354, U. S. Geol. Survey, 1908, p. 48. 



-« J. r. Iddings and W. Cross : Am. Jour. Sci., vol. 30, 1885, p. 108. 



J. F. Kemp : Bull. Geol Soc. Am., vol. 10, 1899, p. 368. 



T. N. Dale : Bull. 354, U. S. Geol. Survey, 1908, pp. 194-204, 205, 207. 



27 W. N. Rice and H. E. Gregory : Bull. No. 6, Conn. Geol. and Nat. Hist. Survey, 1906, 

 p. 154. 



28 E. S. Dana : A System of Mineralogy, 1900, p. 525. 



