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William F. Cannon

Publications and source records attributed to William F. Cannon.

68 records · Page 4Linked to original sources
USGS1977

Bedrock geologic map of the southern part of the Diorite and Champion 7 1/2 minute quadrangles, Marquette County, Michigan

This map illustrates the bedrock geology of part of the Marquette iron range in the Diorite and Champion 7 ½-minute quadrangles. The area includes part of the Marquette trough, a synclinorium containing rocks of the Marquette Range Supergroup (Precambrian X) and older Precambrian W basement gneiss. Among the Precambrian X rocks is the economically important banded iron-formation, and the oldest rocks of the Precambrian W gneiss consist of a mafic-ultramafic volcanic-intrusive complex that contains gold deposits.

Michigan↗
USGS1976

Phosphorite and other apatite-bearing sedimentary rocks in the Precambrian of northern Michigan

Phosphatic pebbles are widespread in basal units of the Marquette Range Supergroup (Precambrian X) in the central part of the Upper Peninsula of Michigan. At one locality, a conglomeratic bed about 15 m thick averages about 15 percent P 2 O 5 , and many thinner beds are of comparable grade. This occurrence is believed to be the richest sedimentary phosphate deposit known in the Precambrian of the United States, as well as one of the oldest. Although outcrops are generally scarce, similar material has been found at four other localities in the Upper Peninsula of Michigan.

Michigan↗
USGS1974

Bedrock geologic map of the Greenwood quadrangle, Marquette County, Michigan

The Marquette Iron Range is presently ( 1973) the second largest iron mining district in the United States. Commercial iron deposits, now mostly concentrating-grade ore, are in the Negaunee Iron-formation, which is part of a thick sequence of metasedimentary rocks of Precambrian X age. These rocks are preserved in the west-trending Marquette synclinorium, and are flanked to the north and south by older Precambrian W crystalline rocks (fig. 1). The Greenwood quadrangle includes part of· the central Marquette Range and part of the Precambrian W rocks south of the range. No mines are active in the quadrangle, but appreciable quantities of iron-formation may be future concentrating-grade iron ore reserves.

Michigan↗