File:Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900-Twenty-First Annual Report of the United States Geological Society (1901) (14782228604).jpg

Identifier: annualreportsofd003unit (find matches)
Title: Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900--Twenty-First Annual Report of the United States Geological Society
Year: 1901 (1900s)
Authors: United States Department of the Interior
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Contributing Library: Clemson University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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d averages about 56.6 per cent. The phosphoruscontent varies from .009 to .738 per cent, and averages about .083per cent. The silica content varies from 2.97 to 39.10 per cent, andaverages about 7.57 per cent. The water content varies from 2.18to 11.20 per cent, and averages about 7 per cent. LOCATION. The Menominee district extends from the Menominee River in adirection about E. 60 to 70 8. It crosses longitude 89°, and liesbetween latitude 45- 45 and 46°. The area which has been mapped isabout 20 miles long and on an average about 6 miles broad. TheHuronian belt has not been mapped farther to the east because it iscapped by the Cambrian sandstone. It has not been mapped west ofthe Menominee River because of the overlying Pleistocene. The dis-trict considered lies wholly in Michigan. The more important townsof the area are Iron Mountain, Quinnesec, Norway, Vulcan, andWaucedah. rather full discussion of this district see Geologic Atlas U. S., folio 62, Menominee. S GEOLOGICAL SURVEY
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N HisE.) MENOMINEE DISTRICT. 389 SUCCESSION OF FORMATIONS. (See Pi. LV.) The succession of formations in descending order is as follows: Succession of form at ions in Menominee district. ■ Silurian and Camljrian ...(Unconformity.) /Herniansville limestone.iLake Superior sandstone. IHanbury slate, bearing in lower portions calcareousslates, etc., containing siderite and iron oxide.Vulcan formation, consisting in descending order ofthree members: (a) Curry member (iron bearing);(h) Brier wlate; (c) Traders member (iron bearing).(IJnconforiiiity.) fXegaunee formation (in small jjatches).Lower Huronian (Lower JRandville dolomite.:\Ienominee series) Isturgeon quartzite. (Unconformity.)Arc..eaii. (Granites and gneisses. iQuinnesec schist. The dolomites and quartzite of the Menominee district are given thesame names as are similar formations in the Ciystal Falls districtbecause the formations have l)een traced almost continuously from onedistrict to the other. STRUCTURE. The Menominee dist

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