. Bulletin of the Geological Society of America. Geology; Geology -- United States. .. A. WINVHELLâRESULTS !â¢' ARCHEAN STUDIES. Thia mass consists of hornblende gneisses, generally vertical, and Btriking Dortheast. The orthoclase is reddish, and the individuals are mostly Largeâ up to three fourths of an inch in diameter. Very rarely rauscovite is present, and not more frequently biotite. The nature of the rock in places bei les decidedly quartzose. A few pebbles of granulite and quartzite arc dissemi- nated through it. This body f gneiss, or granitic gneiss, is everywhere around tlit* Bho
. Bulletin of the Geological Society of America. Geology; Geology -- United States. .. A. WINVHELLâRESULTS !â¢' ARCHEAN STUDIES. Thia mass consists of hornblende gneisses, generally vertical, and Btriking Dortheast. The orthoclase is reddish, and the individuals are mostly Largeâ up to three fourths of an inch in diameter. Very rarely rauscovite is present, and not more frequently biotite. The nature of the rock in places bei les decidedly quartzose. A few pebbles of granulite and quartzite arc dissemi- nated through it. This body f gneiss, or granitic gneiss, is everywhere around tlit* Bhores of White Iron lake diversified l»v numerous inclusions of. Ki'.rm. 1.âD G mitoid and Ghteisaoid Area \ ;-' mica and hornblende schist. This striking phenomenon 1 -hall refer to in another connection.! The Saganaga Arm of granitoid rocks hold- Saganaga lake, with its long southern arm-- centrally located, and lies in Minnesota on the fourth and fifth rang* - of townships, stretching north five or six miles across the into national boundary, where it i< limited by semi-crystalline BchistS. Toward the east-northeasl it extends into Canada an unknown distance, along a zone north of Gunflinl and North lakes. This mass, as a whole, is distinctly a quartz-bearing Byenitic gneiss. Ii is nowhere characteristically massive. The quartz occurs throughout in Large angular individuals, attaining diame- ⢠in default â¢â ! ompany the prenenl memoir ii maybe useful to mention thai the .ill ink ---i in northeastern Mlnm onvenlently ihown on the map Facing p. 418) of the Name* »l la i untain l. '' Boutheaul ol I)to En i "< ir|. I. .nin-i ; toOgiehke-muncie lakeâthe namenemployed In the Minn. n from the plate of the ' B i and Survey. A mor mplete map may be found Hi Ann. Rep of the Minneeota 8urvey e White I ⢠I in my report of IN . th Annu<. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
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