File:The Vermilion iron-bearing district of Minnesota - with an atlas (1903) (14773680482).jpg

Identifier: vermilionironbea00clem (find matches)
Title: The Vermilion iron-bearing district of Minnesota : with an atlas
Year: 1903 (1900s)
Authors: Clements, J. Morgan (Julius Morgan), b. 1869
Subjects: Geology Iron ores
Publisher: Washington : Gov't Print. Off.
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: Boston Library Consortium Member Libraries

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extreme northeastern portion of Minnesota, including portionsof St. Louis, Lake, and Cook counties. The district has an area ofapproximately 1,000 square miles. It is a narrow belt extending east-northeast from near the west end of Vermilion Lake, in longitude 92° 30west from Greenwich, on the west, to the vicinity of Gunflint Lake, on theinternational boundary, on the east, in about longitude 90^ 45 west fromGreenwich. The district lies between 47° 15 and 48° 15 north latitude.It attains its maximum width at the west, where it is about 18 miles wide,and gradually narrows eastward, until at Gunflint Lake its minimum widthis 2 miles. The geographic relations of the Vermilion iron-bearing districtof Minnesota to the other iron-bearing districts of the Lake Superior regioncan be seen on PI. I. The western limit of the district as given on the map (92° 30) is purelyarbitrary. West of this the country is heavily drift covered and timbered, and U, S- GEOLOGICAL SURVEY MONOGRAPH XLV PL I
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.VRCHK.^.N- ;^^^i^--^^L PO ST^fVLGON KIANnUROXIAN EEWEEKAWAK \_/R__) HHl (I^KU I Pa I Including considerable lncladui;), diiisidernhleareas orAlgunkuui ^raiute areas of Arch e mi I llie iron-hearing 3ai AhH lfr«o*( srs^, Aht7 FolO/tl liivti i/( i\ada STRATIGRAPHY. 33 great miiskegs extend over large areas. In that region outcrops are veryscarce, but exposures of banded jasper and iron ore have been found associ-ated with greenstones, granite, and clastic sediments. A reconnaissancetrip was made through it in 1886 by Mr. W. N. Merriam for the United StatesGeological Survey, and this work, as well as that done in that portion of thedistrict for private corporations, to whose results the Survey has had access,shows the futility of attempting at present to

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