Radial and transverse teleseismic receiver functions (RFs) at GSN station ARU, in central Eurasia, display variation in back-azimuth &psgr; consistent with a 1-D anisotropic crustal structure. In a broad &psgr; range, the transverse RFs possess a strong phase at ~5-sec delay relative to direct P, with a polarity reversal at &psgr;~50¿. The radial RFs peak at the transverse-RF polarity reversal for this converted phase. The first motion of the transverse RFs varies with &psgr; also, reversing polarity at &psgr;~345¿. The azimuthal variation can be modeled by a 5-layer velocity profile with substantial (15%) seismic anisotropy in both the lowermost crust and a low-velocity surface layer. Assuming hexagonal symmetry, the lowermost crust has a tilted slow symmetry axis i.e. an oblate phase velocity surface. The strike of the axis is oblique to the north-south Urals trend, but deviates <20¿ from the mantle fast-axis inferred from SKS splitting. The magnitude and tilt of the model's anisotropy suggests that fine layering and/or aligned cracks augment mineral-orientation anisotropy near the top and bottom of the crust.¿ 1997 American Geophysical Union