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<br />VELOCITY OF THE OLD EA.RTHFLOW <br /> <br />The old earthflow seems to be stable and not movlng at thls tlme. <br /> <br /> <br />The contrast between the old stable flow and the younger actlve flow can <br /> <br />be easlly seen on the Slumgulllon Pass road at locallty A. The trees on <br /> <br /> <br />the actlve flow are leanlng, lndlcatlng the lnstablllty and movement of the <br /> <br /> <br />ground ln whlch they are growlng, whereas the trees that are growlng on the <br /> <br /> <br />older flow are stralght, suggestlng stabl1lty ln thls flow. <br /> <br />MOVEMENT OF THE ACTIVE EARTHFLOW <br /> <br />At thls polnt you mlght begln to wonder how the toe of the actlve <br /> <br />flow has gotten to lts present posltlon. Conslderlng the relatlvely slow <br /> <br />rates of movement that are ln effect ln the actlve flow, the toe should <br /> <br /> <br />not be some 12,000 feet from lts source, but more nearly 875 feet. One <br /> <br /> <br />posslble answer to thls problem ls that the actlve flow could have moved <br /> <br /> <br />to a polnt near lts present locatlon ln a relatlvely short tlme, slmllar <br /> <br /> <br />to a landsllde, and then contlnued to move slowly. <br /> <br /> <br />Another posslblllty ls that renewed overburden at the source area, <br /> <br />9 <br /> <br />c <br />o <br />o <br />(7) <br />(,D <br />u;> <br />