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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Listing of the soil and rock deposits are presented below in Subsections <br />5.2.2 and 5.2.3. <br /> <br />5.2.2 Surficial Deposits of Quaternary Age <br /> <br />Artificial fill (af) <br />Recent Alluvium (Qa1) <br />Older Alluvium (Qa2) <br />Floodplain Silt (Qs) <br />Colluvium (Qc) <br />Talus (Qta) <br /> <br />Alluvial Fan (Qf) <br />Eolium (Qe) <br />Landslide No.1 (Ql1) <br />Landslide No.2 (Q12) <br />Landslide No.3 (Q13) <br />Terrace Deposit (Qt) <br /> <br />5.2.3 Bedrock Units <br /> <br />Lyons Sill (Tls) <br />Glennon Member of Lykins Formation (Plg) <br />LaNer Shale ~~mber of Lykins Formation (Pls) <br />Lyons Sandstone (Ply) <br />Satanka Sandstone (Ps) <br />Ingleside Sandstone (Pi) <br />Sandstone Member of Fountain Formation (Pfs) <br />Redstone Member of Fountain Formation (Cfr) <br />Claystone Member of Fountain Formation including Pre-Fountain Regolith (Cfc) <br />Silver Plume Quartz Monzonite (Ysp) <br /> <br />5.3 Geologic Structure <br /> <br />5.3.1 Regional Structure <br /> <br />The sedimentary bedrock sequence in the Study Area forms parts of (a) the <br />western flank of the Denver-Julesburg Basin, and (b) the eastern flank of the <br />Front Range Anticline whose axis in Boulder County is roughly represented by <br />the Continental Divide and whose western flank is located in the eastern part <br />of Grand County on the other side of the Divide. Accordingly, bedding <br />features in the sedimentary rock in the Study Area strike more or less north- <br />south and dip to the east beneath younger sedimentary rocks. On a lesser <br />scale this structure may be referred to as the Front Range Homocline which <br />means that at any given location in the foothills the bedrock units are tilted <br />eastward at a more or less uniform angle. <br /> <br />UEBLACKER ASSOCIATES. INCo <br />