A LATE BRITTLE COMPONENT OF MOTION WITHIN THE DUCTILE EASTERN SIERRA CREST SHEAR ZONE (ESCSZ) ALONG THE EASTERN BOUNDARY OF THE TOLUMNE BATHOLITH IN THE SADDLEBAG LAKE, CA AREA. WHITESIDES, Andrew1, ENRIQUEZ, Marcus2 , HARDY, Jill1 , EHRET, Philip1, IANNONE, Monika1, CULBERT, Kristan1 GROSS, Ben3, LODEWYK, Jessica3, CAO, Wenrong1 , ZHANG, Tao1, MEMETI, Valbone3, PATERSON, Scott1 SCHMIDT, Keegan4. (1) Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, awhitesi@usc.edu , (2) Department of Geological Sciences, Cal State L.A., 5151 State University Drive, Los Angeles, CA 90032, (3) Department of Earth and Planetary Sciences, Washington University, Campus Box 1169, 1 Brookings Dr, Saint Louis, MO, 63130, (4) Division of Natural Science and Mathematics, Lewis-Clark State College, 500 8th Ave., Lewiston, ID 83501