Face-on column density view of a shock-compressed dense layer of molecular clouds. We set up low-mass molecular clouds by the compression of two-phase HI clouds. This snapshot shows the result of an additional compression of low-mass molecular clouds by a shock wave propagating at 10 km s^-1. The magnetic field lines are mainly in a dense sheet of a compressed gas. The color scale for column density (in cm^-2) is shown on top. The mean magnetic field vector is in the plane of the layer, and the directions of local magnetic field lines are shown by white bars. We note the formation of dense magnetized filaments whose axes are almost perpendicular to the mean magnetic field. Fainter “striation”-like filaments can also be seen, which are almost perpendicular to the dense filaments.