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{b D.yFb <br /> O..y4 <br /> c <br /> pmy4 <br /> ^,b Qtiz;b <br /> EIGHT MILE ROA <br /> p..,b <br /> E -- <br /> , <br /> Q«,b <br /> Marchand,D.E.,and Bartow,J.A., 1979,Preliminary geologic map of <br /> Cenozoic deposits of the Ballots Quadrangle,California: U.S.Geological Survey <br /> Open File Report OFR-79-664,scale 1:62,500. <br /> GELOGIC MAP OF SURFACIAL DEPOSITS <br /> LODI AREA <br /> EXPLANATION: Scale 1:62,500 <br /> MODESTO FORMATION 1i = 5208 feet <br /> - upper member includes: <br /> golf foothill-derived alluvial silt, clay, and minor <br /> sand forming terraces, upper fans, and following <br /> disributaries across lower fans; <br /> abundant volcanic detritus. <br /> gm2fb foothill-derived basin and interdistributary overbank <br /> deposits; chiefly clay and silt. <br /> - lower member includes <br /> QM1 arkosic alluvium forming Mokelumne River <br /> terraces and alluvial fan; chiefly sand; <br /> probably glacial outwash. NEIL O.ANDERSON &ASSOC.,INC. <br /> gmlb basin alluvium derived from both the Mokelumne and csoTEcwaKx sEmncEs-E'r2�c",rEEaw� a',Mu=s <br /> Calaveras Rivers; includes arkosic alluvium, probably zo <br /> d <br /> �ssnc` <br /> glacial outwash, and locally-derived materials; <br /> chiefly fine sand and silt. <br /> Qmlb+ Qmlb deposits overlain by 0.5 to 1.5 m of Qm2fb deposits. Plate 6 <br />