Observed spectrum of SDSS J1630+3119 and BAL troughs. The spectrum was slightly smoothed with a Gaussian kernel with a sigma of 3 spectral pixels to help show the absorption features. The spectrum of SDSS J1630+3119 is dominated by strong broad and blueshifted absorption troughs from Mg II, Al III, C IV, and Fe II UV 1, UV 2, UV 3, UV 62,63, Opt. 6,7 and Opt. 8 multiplet transitions, the vertical dash-dotted grey marks indicate the expected rest-frame positions of the resonant lines in these features. The comparison spectrum (shown in green) with similar absorption troughs to SDSS J1630+3119 from the FeLoBAL quasar SDSS J1440+3710 was smoothed and multiplied by 0.75 to match that of SDSS J1630+3119 in the wavelength ranges of 1600−1900 Å and 2800−3300 Å.