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Modified after Marchand, D.E., and Atwater, B. F., 1979, Preliminary geologic map showing Quaternary deposits of the Lodi <br />quadrangle, California: U.S. Geological Survey OF-79-933, <br />Key: <br />Qha Holocene alluvium - channel, levee, and floodplain deposits; chiefly silt and clay with fine sand along principal <br />drainageways <br />Qm Modesto formation - undifferentiated alluvial deposits, mainly arkosic, forming toe of Mokelumne alluvial fan <br />Qr, Riverbank formation upper unit - arkosic alluvium forming Mokelumne River alluvial fan; chiefly sand; probably <br />glacial outwash <br />Qr,f Riverbank formation upper unit - foothill-derived alluvial sand and silt; contains abundant volcanic detritus <br />Qr2 Riverbank formation middle unit - arkosic alluvium forming Mokelumne River terraces and alluvial fan; chiefly <br />sand; probably glacial outwash <br />Qr2f Riverbank formation middle unit - foothill-derived alluvial sand and sift; contains abundant volcanic detritus <br />Geologic Map <br />Chapman Property <br />4214 E. Liberty Rd. <br />Galt, CA <br />Plate No.: 8 <br />Project No: 20-59 <br />LIVE OAK <br />GEO ENVIRONMENTAL INC. <br />Date: February 5, 2021 <br />Scale: 1 in. = 0.5 mi. <br />