THE L1457 MOLECULAR ATOMIC CLOUD COMPLEX - H-I AND CO MAPS/

L1457 is the closest known molecular cloud (65 pc), and it lies near t he edge of the local hot bubble and well out of the Galactic plane (b similar to -34 degrees). We have mapped an 8 degrees x 8 degrees regio n at 35' resolution and a 3 degrees x 5 degrees region at similar to 2 ' resolution in H I 21 cm emission. We have also mapped a 2 degrees x 4 degrees region at 2' resolution in (CO)-C-12 J = 1-0. We find that t here is an extended component of atomic gas, clearly associated with t he molecular complex and comparable to it in total mass. The H I struc ture at small scales in the vicinity of the molecular clouds is remark able, consisting largely of long, narrow filaments less than 20' (0.2 pc) in width and 1 degrees-4 degrees in length. A thin (<10') limb-bri ghtened atomic halo is seen to surround the CO at some velocities, but it is ill-defined at other velocities. The halo may be disturbed by e xternal pressure, perhaps from the hot gas in the local bubble. The mo lecular clouds are part of a large structure similar to 5 degrees x 3 degrees in extent with a small ''funnel-shaped'' extension to the sout h. The structure, which we call the L1457 atomic/molecular complex, is dominated by H I in the north and H, in the south extension. Roughly one-half the mass of the complex is molecular. The structure of this c omplex at both large- and small-scale suggests that the south end has been recently compressed.